WO2011023060A1 - High-strength heat-proof aluminum alloy material and producing method thereof - Google Patents

Abstract

A high-strength heat-proof aluminum alloy material is composed of (by wt%) Cu 1.0-10.0%, Mn 0.05-1.5%, Cd 0.01-0.5%, Ti 0.01-0.5%, B 0.01-0.2%, Zr 0.01-1.0%, at least one selected from the group consisting of Be, Co, Cr, Li, Mo, Nb, Ni and W 0.001-3%, rare earth element 0.05-5% and the balance Al. The alloy can solve the problems of high thermal-cracking tendency during casting and product having low high-temperature strength. The method for producing the aluminum alloy material is also provided.

Description

 High-strength heat-resistant aluminum alloy material and preparation method thereof

 The invention relates to an aluminum alloy material and a preparation method thereof, in particular to an aluminum alloy material of a microalloying element and a rare earth element and a preparation method thereof. Background technique

 Aluminum alloy is a younger metal material that was only used in industrial applications in the early 20th century. During the Second World War, aluminum was mainly used to make military aircraft. After the war, as the demand for aluminum in the military industry plummeted, the aluminum industry began to develop civilian aluminum alloys, expanding its application range from the aviation industry to the construction industry, container packaging, transportation, power and electronics industries. Various sectors of the national economy, such as machinery manufacturing and petrochemicals, are applied to people's daily lives. Nowadays, aluminum is used in a wide range and is second only to steel and is the second largest metal material.

 From the perspective of manufacturing and aluminum alloy products, it is customary to classify high-strength aluminum alloy into two types: deformed aluminum alloy and cast aluminum alloy; from the available temperature conditions, high-strength aluminum alloy is divided into ordinary aluminum alloy and high temperature ( Or heat resistant) aluminum alloy. Up to now, only Al-Cu-based aluminum alloys can be used to meet the needs of high temperature and high strength. From the grade series, Al-Cu alloys include cast aluminum alloys and deformed aluminum alloys, and both cast and deformed belong to 2 series aluminum. Alloy; high-temperature high-strength aluminum alloy which can satisfy both casting performance and deformation and twisting has not been reported by the public.

 1. High-strength cast aluminum alloy and deformed aluminum alloy

 Generally, the cast aluminum alloy includes four series of AlSi system, AlCu system, AlMg system and AlZn system. Among them, AlCu and AlZn aluminum alloys have the highest strength, but most of them are between 200Mpa and 300Mpa, and those with AlCu are higher than 400Mpa. A few grades, but because of the use of a refined aluminum matrix and the addition of valuable elements, the manufacturing cost is very high; AlZn-based casting alloys have poor heat resistance. Therefore, compared with the deformed aluminum alloy, the cast aluminum alloy generally has a relatively limited application range due to its poor toughness. Many important applications, such as special heavy-duty truck wheels, aerospace aluminum alloys, etc., use deformed aluminum alloys instead of cast aluminum alloys. The deformed aluminum alloy reduces defects by extrusion, rolling, forging, etc., refines the crystal grains, increases the density, and thus has high strength, excellent toughness, and good use performance. However, the equipment and tooling molds have high requirements and many processes, so the deformed aluminum alloy has a long production cycle and high cost. Compared with deformed aluminum alloys, cast aluminum alloys have many advantages such as low cost, tissue isotropy, special organization, easy production of complex shapes, small batch production, and large batch production. Therefore, the development of a high-strength and tough-cast aluminum alloy material capable of replacing a partially deformed aluminum alloy and its casting forming process can achieve the purpose of casting forging, shortening the manufacturing cycle, and reducing the manufacturing cost, and has important theoretical significance and significant practical application. value.

In the development of high-strength and tough-cast aluminum alloys, the A-U5GT, which was successfully developed in France in the early 20th century, has an important position. It is the oldest and most widely used in the current representative high strength and toughness cast aluminum alloy. There is currently no corresponding brand in China.

 The American Aluminum Association grades 201. 0 (1986) and 206. 0 (1967) were formed on the basis of the A-U5GT and have good mechanical properties and resistance to stress corrosion. However, since it contains 0.4% to 1.0% of silver, the material cost is high, and it is only used in military or other high-demand areas, which limits its application range.

 In the field of high-strength and tough-cast aluminum alloys, China has achieved world-renowned achievements. From the 1960s to the 1970s, the Beijing Aerospace Materials Research Institute successfully developed the ZL205A alloy. ZL205A alloy has complex composition and contains seven alloying elements such as Cu, Mn, Zr, V, Cd, Ti and B. ZL205A (T6) has a tensile strength of 510 MPa, which is the highest strength of cast aluminum alloys with registered grades. ZL205A (T5) has the best toughness and an elongation of 13%. However, the biggest drawback of ZL205A is its poor casting performance and high thermal cracking tendency. At the same time, due to its high formulation cost and small application range.

 The above three kinds of high-strength and tough cast aluminum alloys belong to the ΛΙ-Cu system. The series of alloys are high in strength and good in plasticity and enthalpy. However, the casting performance is poor, and the concrete performance is that the hot cracking tendency is large, the fluidity is poor, and the feeding is difficult. In addition, this series of alloys have poor corrosion resistance and tend to intergranular corrosion. The casting yield of this series of alloys is very low.

 In addition, the published patents No. 200810302670. 3, 200810302668. 6, 200810302669. 0 and 200810302671. 8 of the four patents are all "a high-strength cast aluminum alloy material". High-strength cast aluminum alloy material composed of Mn, Ti, Cr, Cd, Zr, B and rare earth elements. This aluminum alloy material has high tensile strength and elongation, tensile strength of 440Mpa and elongation of more than 6 However, such high-strength cast aluminum alloy materials still fail to solve the problem of large thermal cracking tendency during use, and the contradiction between alloy strength and castability is prominent. The main reason is the range of Cu and Mn components of the main elements of the alloy. The alloy has a wide range of quasi-solid phase temperature, which provides sufficient conditions for anisotropic dendrite development during casting solidification, and forms strong internal shrinkage stress in the late solidification stage, so the shrinkage hot cracking tendency is large.

 At present, there are more than 70 2XXX deformed aluminum alloy brands officially registered, most of which are registered in the United States, of which only 2001, 2004, 2011, 2011A, 2111, 2219, 2319, 2419, 2519, 2021, 2A16, 2A17, 2A20 14 brands such as 2B16 are high-copper aluminum alloys with copper content above 5%, and only 4 grades of 2A16, 2A17, 2A20, 2B16 with copper content above 6%. These deformed aluminum alloy formulations contain more Si, Mg, Zn and other components, and do not have elements such as rare earth (RE) which are microalloyed. Therefore, the formulation composition is far from the 2 series cast aluminum alloy, reflecting Different properties of the aluminum alloy with different production processes and deep processing.

 2, high temperature aluminum alloy

Superalloys, also known as heat-resistant high-strength alloys, heat-strength alloys or superalloys, are an important metal material developed in the 1940s with the advent of aerospace turbine engines. They can withstand high temperature oxidizing atmospheres and gas corrosion conditions for a long time. Larger working loads, mainly used for hot end components of gas turbines, are important structural materials for the aerospace, marine, power generation, petrochemical and transportation industries. Some of these alloys can also be used in bioengineering for orthopedic and dental materials. Commonly used superalloys include nickel-based, iron-based, and cobalt-based alloys that can operate at temperatures ranging from 600 to 1100 ° C; while heat-resistant aluminum alloys were developed during the Cold War. The heat-resistant high-strength aluminum alloy is suitable for long-term large working load in a thermal environment below 400 ° C, and is increasingly used in aerospace, heavy machinery and other fields. In addition to aviation turbine engines, gas turbines and other components directly in contact with high-temperature gas, the remaining high-temperature and high-pressure power components can be cast with heat-resistant high-strength aluminum alloy.

 Since aluminum alloys are relatively easy to process, with the improvement of the processing technology level, more and more deformed aluminum alloys are used instead of cast aluminum alloys when the strength meets the requirements. Therefore, the heat-resistant high-strength aluminum alloy is divided into two major categories: alloy for casting and alloy for deformation.

 In general, heat-resistant high-strength alloys contain a variety of alloying elements, more than ten kinds. The added elements act as solid solution strengthening, dispersion strengthening, grain boundary strengthening and surface stabilization in the alloy, so that the alloy can maintain high mechanical properties and environmental properties at high temperatures.

 Factors to consider when selecting high temperature alloys for casting:

 (1) The normal operating temperature of the casting, the highest and lowest operating temperatures, and the frequency of temperature changes.

 (2) The temperature difference range of the casting itself and the expansion properties of the alloy.

 (3) Load performance of castings, loading, support and external restraint.

 (4) Life requirements and allowable deformation of castings, working environment and properties, forming methods and cost factors. At present, the aluminum alloy materials used for casting high-temperature parts are only A201. 0, ZL206, ZL207, ZL208,

206. 0 several grades, including aluminum-copper-manganese alloys and aluminum-rare-earth alloys; among them, aluminum-copper-manganese alloys mostly use high-purity grade aluminum ingots as alloy materials, and the cost is higher, while aluminum rare earth alloys are at room temperature. The mechanical properties are relatively poor. Moreover, the current heat-resistant high-strength aluminum alloy generally has low temperature strength (the instantaneous tensile strength above 250 °C is less than 200Mpa, the permanent strength is less than 100Mpa), the formula cost is high, the casting performance is poor, the casting pass rate is low, the waste material and the slag material are returned. Defects such as poor usability cause problems such as poor casting quality, high cost, and long slag processing. In addition, most of the new formulations for heat-resistant aluminum alloys declared in recent years also contain valuable elements, and the casting properties are poor. The quality cannot meet the requirements of aviation technology advancement and is not suitable for industrial production applications.

 The heat-resistant high-strength deformed aluminum alloy, which has wide application and extremely bright prospects in the national economy and national defense modernization construction and development, has been reported in domestic and foreign literatures. Known 2219, 2A02, 2A04, 2A06, 2A10, 2A11, 2A12 2A14, 2A16, 2A17, 2A50, 2A70, 2A80, etc. 2XXX series deformed aluminum alloy and 7A04 and other 7XXX series deformed aluminum alloy, the strength is mostly less than 100 Mpa at temperatures above 250 °C, and the main alloying elements except Cu, Mn The heat-resistant high-strength aluminum alloy materials with Si, Mg, and Zn as the main microalloying elements without adding these elements and having a strength of 150 Mpa or more at a temperature of 250 ° C or higher have not been reported.

In summary, it can be seen that the problems existing in the research of heat-resistant high-strength aluminum alloy at home and abroad are: high temperature strength and Insufficient durability, high temperature instantaneous strength above 250 °C is less than 250Mpa, high temperature endurance strength is less than 100 Mpa; material processing performance is poor; waste processing process is long, high cost, can not meet the requirements of aviation technology advancement. Summary of the invention

 The technical problem to be solved by the invention is that the melt treatment process existing in the field of high-strength aluminum alloy is extensive, the quality is poor, the hot cracking tendency is large, the casting performance is poor, the product yield is low, the high temperature strength is low, the waste material and the slag material are returned. Technical problems such as poor use, guided by high-quality melt, solid solution and phase diagram theory, reduce the alloy quasi-solid phase temperature range by optimizing the alloy main elements Cu, Mn and rare earth elements, and solve the problem of high thermal cracking tendency and high temperature of products during casting. Low-strength (including instantaneous strength and long-lasting strength) with general problems; preferred low-cost multi-microalloying element formulation, creating material basis conditions for the cultivation and fine crystallization of high-temperature and strengthening phases in solid solution; Casting, heat treatment process technology and equipment (mainly including refining, degassing, impurity removal, rare earth composite element degassing, impurity removal, high-efficiency compound metamorphism treatment, crystallization control, special heat treatment, etc.), achieving high temperature phase and strengthening phase in solid solution The full play of the amount of cultivation and fine crystallization. Finally, a new type of high-strength heat-resistant (casting and deforming) aluminum alloy material of rare earth multi-alloyed AlCu system was developed.

 5%, Cd: 0. 01〜0· 5%, Ti, the composition of the alloy is Cu: 1. 0~10. 0%, Mn: 0. 05~1. 5%, Cd: 0. 01~0· 5%, Ti : 0. 01~0· 5%, Β : 0· 01~0· 2%, Zr : 0. 01~1· 0%, R: 0· 001~3% or: 0. 001~3%, Rare Earth Element RE: 0. 05~5%, the rest is Al.

The above characteristic metal elements R, Ri, and R ₂ have a certain selected range, and include: Be, Co, Cr, Li, Mo, Ni, W, and a total of eight elements.

 The above rare earth element RE is a single rare earth element or one or more mixed rare earth elements.

 The above rare earth element RE includes La, Ce, Pr, Nd, Er, Y and Sc.

 The preparation method of the novel high-strength heat-resistant aluminum alloy comprises the following steps:

 (1) Within a range of the above-mentioned elements, select a set of possible element ratios, and then calculate the mass of each elemental metal required, or the quality of the intermediate alloy, or the mixed metal additive, according to the total amount of the alloy to be formulated. The quality of the salt compound (including the salt compound), the preparation of the alloy production ingredient list, and the preparation of the ingredients according to the ingredient list.

 (2) Add an appropriate amount of aluminum ingot or molten aluminum to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling excessive air, the melting process should be as short as possible. Completed inside and inside the closed environment.

(3) Add Mn, Ti, Zr, R, R ₂ pure metal or Al_Mn, Al-Ti, Al-Zr, Al-R, AI-RL Al-R ₂ master alloy or mixed metal additive according to the formula ratio. Including salt compounds), after stirring evenly, add Cu, Cd pure metal or Al-Cu, Al-Cd intermediate alloy or mixed metal additives (including salt compounds), then add B and rare earth element RE, and stir evenly.

Among them, the mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component. Powder metallurgy products include manganese, copper, zirconium, R, Ri R ₂ , boron or titanium metal powder mixed with flux; flux refers to a mixture of alkali metal or alkaline earth metal halide salts (such as NaCl, KC1, N3⁄4A1F _6, etc.) .

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) In order to prevent over-burning of the material, it is determined that the casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 Compared with the prior art, the present invention has the following main advantages:

 Solved the current high-strength aluminum alloys of Al-Cu series (ZL201A, ZL 204A, ZL 205A, etc.). Most of them use fine aluminum as the base material and add more than one thousandth of precious elements. The cost is high, resulting in high-strength bismuth-alumina. Alloys can only be used in cutting-edge fields such as aerospace and defense military. The civilian sector is limited in application due to low cost performance.

 With the rapid growth of aluminum production in China and the world and the continuous expansion of the scale of aluminum industry in China, "aluminum-based steel" has become a trend and trend of industrial development, and high-strength and tough aluminum alloys with high cost performance are urgently needed in the civilian field; The invention develops a new high-strength heat-resistant aluminum alloy material by adopting the general aluminum raw material, without adding (or adding less) precious elements, preferably the characteristic micro-alloying element formula, and adopting intensive, concise melting casting and purification processes. Overcoming the cost threshold of existing materials.

 In particular, the present invention has the following eight advantages.

 1. High strength and high hardness. From the material strength point of view, under the premise of meeting the plasticity requirements, various strengthening phases can be fully, uniformly and reasonably precipitated and distributed in the as-cast microstructure by heat treatment and other technical means, so that the material strength reaches 480~540 MPa; hardness HB140 .

 2. The dual attributes of the material. From the point of view of the material use properties, it belongs to the amphoteric aluminum alloy. It has the characteristics of cast aluminum alloy and the characteristics of deformed aluminum alloy. It can be directly used to cast various light and powerful functional parts and structural parts, or it can be cast into rods first. The material is then hot extruded into profiles of various sections.

 In essence, the material belongs to a multi-microalloyed cast aluminum alloy, but due to its excellent fluidity and intergranular self-lubricating properties, it has the easy processing characteristics of the deformed aluminum alloy.

 3. The advanced nature of the process. In terms of production process, the traditional extensive process has been changed in the smelting technology, and the electric furnace can be used for strict protective smelting, thereby avoiding the incorporation of excessive impurities and gases into the melt, thereby maintaining the purity and simplification of the alloy. And shorten the complicated subsequent melt treatment process; at the same time, the smelting process greatly improves the energy utilization rate and reduces the pollution to the environment compared with the traditional reflective smelting process, and belongs to the green environmental protection and energy-saving process.

(1) Protective smelting significantly reduces energy consumption and pollution, simplifies the production process and improves the degree of intensification Since the aluminum and aluminum alloy melts have a strong tendency to inhale, the melted alloy liquid absorbs a large amount of gas in the air, moisture, etc. when melted and smelted in an open or poorly sealed furnace, resulting in insolubility. A1 ₂ 0 ₃ and good activity, the formation of impurities and gases in the melt, if not removed in time, will form defects such as slag inclusions, pores, looseness of the casting during casting, resulting in scrapping of the product; Medium 3⁄4 is the most harmful because the solubility in the molten state of aluminum and aluminum alloy is much higher than that in the solid state, so when solidified, there will be a large amount of defects from the alloy causing a large number of defects. Insoluble slag is relatively easy to remove. Therefore, avoiding melt uptake is an important measure to maintain melt quality and casting quality.

Ordinary large-scale industrial aluminum alloy melting furnace is a reflective heating furnace or holding furnace that uses liquid or gaseous fuel as energy source. It requires a large amount of air to assist combustion, and the combustion products contain a large amount of water vapor and C0 ₂ , _{! (} etc. The lower electrode is easily chemically reacted with aluminum to form various harmful impurities. At the same time, these impurities are as easily adsorbed as the aluminum liquid, causing the melt to be seriously contaminated. Before casting, the melt must undergo one or several special purifications. After the process, and after passing the sampling test, the casting process can be entered, which undoubtedly prolongs the operation process, and the energy consumption and pollution indicators are difficult to reduce. At the same time, because of the continuity of production, the equipment must be enlarged, the investment increased, and the technology is improved. Access thresholds; and the cost of overhaul and startup costs of equipment have doubled with the size and long process of equipment.

 In the general aluminum alloy casting production workshop, due to the small scale of production and simple and extensive equipment, the sealing action of aluminum alloy melt is rarely taken, which also results in low melt quality and casting quality.

 The preparation method required by the invention adopts an induction electric heating device with a sealing cover to eliminate the contamination of the melt by air, water vapor and various combustion products during fuel combustion, and at the same time, protection can be adopted during the melting process. The gas is smelted in a protective atmosphere to maximize the insulation of the air; since the high purity of the melt is maintained, a simple pass-through degassing and slag removal device can be adopted in the subsequent casting stage without having to add a special stay. Insulation purification equipment, which greatly simplifies the process.

 (2) Optimized the heat treatment process of the castings, avoiding the deterioration of the mechanical properties of the materials caused by "overburning" and the occurrence of scrapping of the products.

The application number is 200810302670. 3, 200810302668. 6, 200810302669. 0 and 200810302671. The four patent names are all "a high-strength cast aluminum alloy material". The heat treatment process parameters of the specified material are "620 °C". In the following, within 72 hours, in the material application test, it was found that when the temperature at the solution treatment exceeds 560 °C, the phenomenon of "overburning" often occurs, causing damage to the microstructure of the material, which is typically characterized by strength and ductility. The main indicators are significantly reduced, the castings become brittle, the surface is dark and dark, and even cracks, deformations and scraps occur during heat treatment. When the solid solution temperature is lower than 470 ° C, the strength of the material is difficult to reach the desired target value due to insufficient cultivation and precipitation strengthening of the strengthening phase. Meanwhile, after several trials, it is found that the heat treatment time exceeds 30 hours. , there is no significant effect on the improvement of material properties. Therefore, in order to improve the effect and efficiency, the heat treatment process parameters are optimally adjusted to: 470~560 ° C, solid within 30 hours. Dissolved.

 4. Scientific and economical formula. From the source of raw materials, advanced formulas create two advantages – the advantages of base materials and the advantages of alloying elements. On the one hand, the base alloy of the new material series can be made of ordinary industrial pure aluminum (ie, double-zero aluminum, including aluminum liquid and aluminum ingot for remelting). Compared with the existing high-strength aluminum alloy, it is necessary to use refined aluminum or high-purity aluminum. The formulation mode of the base alloy has the advantages of sufficient raw material supply, low cost and convenient procurement. At the same time, the material can also be made of refined aluminum or high-purity grade aluminum as the base alloy, and the material of the formula is higher than that of the product. The material has a higher ductility. On the other hand, because the contribution rate of precious elements to the increase of alloy cost is tens or even 100 times that of common elements, most of the alloy element combinations of the new material series do not use precious elements, even if they are used, the ratio is small, Less than one part; and the proportion of existing high-strength aluminum alloy precious elements is more than one thousandth. The advantages of both sides have great potential for expanding the market for new materials.

 The invention preferably comprises the main elements of the alloys copper (Cu), manganese (Mn), and beryllium (Be), cobalt (Co), chromium (Cr), lithium (Li), molybdenum (Mo), niobium (Nb), nickel. One of the eight characteristic elements (Ni), tungsten (W), or a combination of any two of them, constitutes a multi-alloying composition of microalloying elements, creating a material basis for the cultivation and fine crystallization of the high-temperature phase and the strengthening phase in the solid solution condition.

On the basis of the main element Cu and Mn forming the strengthening Θ phase (Al ₂ Cu) and the T phase (Al ₁₂ Mn ₂ Cu), the high activity element (Be) is selected to form the α, β diffusion high temperature strengthening phase in the alloy. It can prevent oxidation, burning and inhalation of alloying elements, improve the metallurgical quality of the alloy and the density of the surface oxide film, and can change the impurity iron (Fe) from needle to pellet, and prevent sand casting and casting. The recoil of the model; the choice of high-temperature element cobalt (Co), the formation of 8 kinds of dispersive high-temperature strengthening phase such as AlCo, Al ₉ Co ₂ in the alloy, Co and is a trace addition element of complex alloyed high-strength cast aluminum alloy, When it coexists with Mn, it forms a complex strengthening phase such as Al ₄ (CoFeMn) between the dendrites, hinders dislocations, prevents grain slippage, and effectively increases the room temperature and high temperature (at 400 ° C) strength of the alloy; Select high temperature element chromium (Cr), and form five kinds of diffuse high temperature strengthening phases such as β _ΟΑ1 ₇ and n -Cr ₂ Al in the alloy; select high solubility element lithium (Li), and form Al ₂ Li ₃ in the alloy, 5 Species AlLi diffuse high-temperature accelerated phase ₅ and the like, the alloy can be improved And the degree of corrosion resistance; temperature selected elements molybdenum (Mo), an alloy is formed in the 13 kinds of the metal compounds in a high temperature diffuse Α1Μο ₃ ~ Al ₁₂ Mo et strengthening phase; temperature selection element niobium (Nb), AlNb ₃ is formed in the alloy, Three kinds of metal compounds such as AlNb and Al ₃ Nb are dispersed in high temperature strengthening phase; high temperature element nickel (Ni) is selected, and five kinds of diffused high temperature strengthening phases such as AlNi ₃ and Al ₃ Ni can be formed in the alloy to improve the high temperature strength of the alloy and Volume, dimensional stability, and the tendency to make Fe compounds block, that is, reduce the harmful effects of impurities Fe; select high temperature element tungsten (W), form A1 ₁₂ W, A1 ₆ W, A1 ₄ W in the alloy Three kinds of diffuse high-temperature strengthening phases are added to increase the high-temperature strength of the alloy.

The rare earth element RE in the aluminum alloy capable of forming a plurality of metal compounds (e.g., lanthanum aluminum has _{a -A1 U L ¾, β -Al} u La 3, AlLa 3 , etc., aluminum, cerium has _{a -Ce 3 Al u, CeAl 3} , CeAl _2, etc., aluminum bismuth has a-Al _u Pr ₃ , Ρ _AlPr _{3 ,} etc., aluminum bismuth has a -Al _u Nd ₃ , AlNd _{3 ,} etc., aluminum bismuth has AluPm^ AlPnfe, etc., aluminum bismuth has Al _u Sm ₃ , AlSm ₂ Etc., aluminum bismuth has Al ₄ Eu, AlEu, etc., aluminum bismuth has Al ₄ Gd, Al ₁₇ Gd _{2 ,} etc., aluminum bismuth has Al ₃ Tb, AlTb _{2 ,} etc., aluminum bismuth has a -Al ₃ Dy, AlDy _2, etc., aluminum钬有Α1 ₃ Ηο, Α1Ηο _2, etc., aluminum 铒 There are Al-Er: Al ₃ Er, AlEr _2, etc., aluminum bismuth has Al ₃ Tm, AlTm, etc., aluminum bismuth has Al ₃ Yb, Al ₂ Yb, etc., aluminum bismuth has Al ₃ Lu, AlLu _{2 ,} etc., aluminum bismuth has A1 ₃ Y, A1Y _2, etc., Al ₃ Sc, AlSc _2, etc., with nearly 100 kinds of refractory active metal compounds), all significantly improve the room temperature strength, heat resistance and melt flowability of the alloy.

 The mechanism of action of the main alloying elements of the present invention is as follows.

 1 The material allows the copper (Cu) content to be in the range of 1 to 10%, which is slightly different from the range of 3 to 11% of the Cu-containing (Cu) in the Al-Cu-based cast aluminum alloy, but is theoretically extremely significant. Innovative meaning.

On the one hand, when the copper (Cu) content is 5.65~5. 7%, it is exactly equal to the eutectic solubility of Cu in the Al-Cu alloy, and in the heat treatment process, according to "complete solid solution-uniform precipitation-grain boundary strengthening" The phase-grain filler (bonding, inlay, anti-slip) changes the mode and mechanism of action, forming more Cu-rich strengthening phase (including Al ₂ Cu or Θ phase), so that the room temperature and temperature of the aluminum alloy The mechanical properties are greatly improved, and the processing performance is also improved. However, since the solubility of Cu in A1 decreases sharply with the decrease of temperature, the supersaturation of Cu in α-Λ1 solid solution increases rapidly during crystal solidification, α—Λ1 When the dendrite grows, it strongly increases the tendency of the Cu-rich strengthening phase to be discharged outside the grain boundary, causing huge structural stress between the crystal and the grain boundary, and the alloy as a whole is in the stage of solidification and shrinkage, and the shrinkage stress is superimposed on the structural stress. When the actual actual strength of the alloy is exceeded, hot cracks are formed. Therefore, in a certain range of copper (Cu) content of 5.65%, the aluminum alloy has the worst casting performance and the hot cracking tendency. However, the general trend is that as the copper content decreases, the thermal cracking tendency of the alloy also decreases. When the Cu content is less than 1%, the strengthening phase is insufficient, and the transformation mode and mechanism of the strengthening phase are difficult to fully exert. Precipitation at the grain boundary and dissolution into the crystal form more defects between the grain boundaries, lowering the room temperature and high temperature strength of the alloy, so the Cu content is too low, which is meaningless for a simple Al-Cu alloy; If more rare earth elements (RE) are added to the alloy, it can serve to compensate for the special effect of the low Cu content.

 On the other hand, when the Cu content is 7%, the Cu-rich phase cannot be completely absorbed by the matrix during heat treatment, and is dispersed in the grain boundary in the form of a boundary-rich Cu metal compound, which lowers the concentration difference of Cu-sites in the solid solution of α-A1 in vivo and in vivo. During the solidification process, the strength of the Cu-rich phase discharged from the α-A1 solid solution dendrites to the grain boundary is moderated, that is, the structural stress and thermal cracking tendency are lowered. Obviously, when the Cu content is 5.7%, the more Cu-rich phase, the smaller the structural stress and thermal cracking tendency inside the alloy during crystallization; meanwhile, the Cu-rich phase with high melting point fine crystal dispersion forms active heterogeneity during melt crystallization. The crystal nucleus accelerates the melt crystallization reaction but prevents the crystal nucleus from growing, refines the crystal grains, and also reduces the thermal cracking tendency of the alloy; and makes the filling between the grain boundaries of the substrate more full; the Cu-rich phase can also interact with Al, Various elements such as Mn form a refractory metal compound. All of these effects significantly weaken the surface tension of the melt and lower the melt viscosity, thereby significantly improving melt flow and casting properties of the alloy.

When the Cu content is about 5.7%, after the heat treatment, there are more Cu-rich phases (dissolved into a precipitated phase) and less (about 0.5%) Cu-based metal compound fine crystals in the matrix grain boundary. The dispersed phase keeps the strength of the alloy at room temperature high, but when it is in a high temperature environment, due to the re-dissolution of a large amount of Cu-rich phase into the matrix, it will cause more intercrystalline voids and defects, which will make the alloy The high temperature strength drops significantly. As the Cu content continues to increase, the strength of the alloy is reduced by the degree of temperature, and When the bulk phase and the precipitation phase are basically in the same state, the material strength is the least affected by the temperature change. At this time, the Cu content in the alloy should be 11 to 12%.

 However, when the Cu content in the alloy is >10%, the excessive Cu phase has a preferential network property to form a huge network structure, and the viscosity of the alloy is greatly enhanced. The excess phase replaces the aluminum matrix in the crystallization process to become a main factor for controlling crystallization. The excellent effects of the original dispersion on the aluminum matrix phase are all shielded, so the various properties of the alloy are greatly reduced.

 According to the above theoretical basis and practice verification, the reasonable range of determining the Cu content of the main alloying elements is: l~10% (wt%).

2 This material improves the corrosion resistance with manganese (Mn) element while shielding the impurity Fe to reduce the harmful effects of Fe.

Due to manganese (Mn) and the base element ΜηΑ1 ₆ Generated by pure aluminum having the same potential, can effectively improve the corrosion resistance and weldability of the alloy; Mn same time as a high temperature strengthening phase, have an increased recrystallization temperature, recrystallization inhibition The effect of grain coarsening can achieve solid solution strengthening, supplementation and strengthening of the alloy, and improve heat resistance; under the action of grain refiner, it can form pelletized Al ₃ (Fe, Mn) with Fe element. The harmful effect of Fe on the alloy is effectively eliminated, so the invention can allow the Fe content to be in a wide range (Fe 0.5%), which brings the advantages of: achieving the replacement of refined aluminum by ordinary aluminum, reducing the cost, and expanding the source of raw materials. And materials applications.

 3 The main use of rare earth RE as the basic micro-alloying element, and its content range is large, up to 5%, which can fully exert the degassing, slag removal, purification, fine grain and metamorphism of rare earth elements in the alloy, Improve the mechanical properties and corrosion resistance of the alloy.

The mechanism of degassing, slag removal and purification of rare earth elements is: Rare earth elements have strong activity, strong affinity for oxygen, hydrogen, sulfur, nitrogen, etc., and their deoxidation ability exceeds the most powerful deoxidizer aluminum available. the content of oxygen is 50 X 10- ^6, off to 10 X 10- ⁶ or less, which can effect the desulfurization of the S content to 20 X 10- ⁶ off 1~5 X 10- ^6. Therefore, the rare earth-containing aluminum alloy is easily chemically reacted with the above substances in the aluminum liquid during smelting, and the reaction product is insoluble in aluminum and enters the slag, thereby lowering the gas content in the alloy, causing pores and shrinkage in the alloy product. The tendency is greatly reduced.

Rare earth elements can significantly improve the mechanical properties of the alloy. The rare earth element can form a stable high melting point intermetallic compound such as A1 ₄ RE, Al ₈ CuRE, Al ₈ Mn ₄ RE, Al ₂₄ RE ₃ Mn or the like in the aluminum alloy. These high-melting-point intermetallic compounds are dispersed in the inter-crystal and dendrites in the form of a network or a skeleton, and are firmly bonded to the matrix to strengthen and stabilize the grain boundaries. At the same time, a certain amount of AlSiRE phase is formed in the alloy. Because of its high melting point and hardness, it has a good effect on improving the heat resistance and wear resistance of the alloy. In addition, the low-melting impurity elements Sn, Pb, Sb, etc. in the molten metal can be neutralized, and they form a compound having a high melting point or uniformly distribute them from the dendrite to the entire crystal, thereby eliminating the dendrite structure.

Rare earth elements have fine grain and metamorphism. Rare earth elements are surface active elements, which can be concentrated at the crystal interface, reduce the melt viscosity, enhance the fluidity, and reduce the tensile force between the phases, because the work of forming the critical size nucleus is reduced, and the number of crystal nuclei is increased. Refine the grain. The modification effect of rare earth on aluminum alloy has long-lasting effect and remelting stability. Most single or mixed rare earths have strong refinement and metamorphism on a-A1 phase. In addition, the rare earth element can also improve the electrical conductivity of the alloy. Since the rare earth can refine the aluminum crystal grains, it can also form stable compounds (such as CeFe ₅ , CeSi, CeSi _{2 ,} etc.) in the alloy, such as CeFe ₅ , CeSi , CeSi _{2 ,} etc., and precipitate out from the crystal, together with the purification effect of the rare earth on the alloy, The electrical resistivity of aluminum is lowered and the electrical conductivity is improved (about 2%).

 A very small amount of rare earth element RE can produce significant deterioration and improvement of alloy properties. Therefore, the rare earth addition amount of aluminum alloy is generally less than 1%, in 200810302670. 3, 200810302668. 6, 200810302669. 0 and 200810302671. 3%。 The application of the rare earth content is determined to be 0. 05~0. 3%. From the phase diagram of the A1-RE alloy, since most of the rare earths have a low solubility in aluminum (e.g., Ce is about 0.01%), the presence of the high-melting intermetallic compound is mostly distributed in the grain boundary or the inside of the crystal. Due to its high activity, it acts as a scavenger in the purification of the melt, and if it is added too little, the deterioration of the α-Al phase is difficult to exert. 05〜5%。 In order to maintain the long-term effect of the rare earth metamorphism and re-melting stability, and the full-featured properties of the high-temperature, the present invention, the copper content and the rare earth content, the content of the range of 0. 05~5%.

 4 铍 (Be) element as a characteristic addition element of complex alloying, forming α, β diffusion high-temperature strengthening phase in the alloy, can prevent oxidation, burning loss, and suction of alloying elements, improve metallurgical quality of alloy and surface oxide film The density of the impurities can change the iron (Fe) from acicular to agglomerated, and also prevent the recoil of the sand casting and the model during casting;

Chromium (Cr) element is a characteristic addition element of complex alloying. In the alloy, five kinds of dispersive high-temperature strengthening phases such as β _ΟΑ1 ₇ and 11 -3⁄4^1 can be formed, which are distributed in the grain boundary of the matrix to improve the room temperature and high temperature strength of the alloy. ;

Cobalt (Co) is a trace additive element of complex alloying. Eight kinds of dispersive high-temperature strengthening phases such as AlCo and Al ₉ Co ₂ are formed in the alloy. Co is a trace additive element of complex alloyed high-strength cast aluminum alloy. When Mn coexists, a complex strengthening phase such as Al ₄ (C ₀ FeMn) is formed between the dendrites, hindering dislocations, preventing grain slippage, and effectively increasing the room temperature and high temperature (at 400 ° C) strength of the alloy;

Nickel (Ni) is a micro-additive element for complex alloying. Five kinds of dispersive high-temperature strengthening phases such as AlNi ₃ and Al ₃ Ni are formed in the alloy to improve the high temperature strength, volume and dimensional stability of the alloy, and compounds for making Fe a tendency to become a block, that is, to reduce the harmful effects of the impurity Fe;

Lithium (Li), as a trace additive element of complex alloying, forms five kinds of dispersive high-temperature strengthening phases such as Al ₂ Li ₃ and AlLi ₅ in the alloy, which can improve the hardness and corrosion resistance of the alloy;

As a trace additive element of complex alloying, niobium (Nb) forms a dispersive high-temperature strengthening phase of three kinds of metal compounds such as AlNb ₃ , AlNb and Al ₃ Nb in the alloy;

Molybdenum (Mo) is a micro-additive element of complex alloying, and 13 kinds of metal compound diffusing high-temperature strengthening phase such as Α1Μο ₃ ～Α1 ₁₂ Μο is formed in the alloy;

Tungsten (W), as a trace additive element of complex alloying, forms three kinds of dispersive high-temperature strengthening phases such as A1 ₁₂ W, A1 ₆ W, and 1 in the alloy to improve the high temperature strength of the alloy.

The above eight elements, each added alone, or a combination of two elements, form a saturated melt and a supersaturated solid solution, Both of them have solid solution strengthening, strengthening phase strengthening, dispersion strengthening and grain refining.

 5, excellent casting performance. The excellent performance of the new material was verified by multiple casting tests on castings used in high-tech structures, aerospace, aerospace, civil heavy work, etc.: Casting performance is higher than current A201. 0, ZL206, ZL207, ZL208, 206 0. High-strength cast aluminum alloy, completely solves the major problems of high thermal cracking tendency and low casting pass rate when casting the above aluminum alloy; old material remelting and new material can realize any proportion of ingredients, new and old material mixed melt The casting performance is unchanged, and it has a good effect of stabilizing the strength of the material and improving the ductility. Compared with the original high-strength aluminum alloy scrap, the recyclability is poor and the circulation route is long, which is extremely economical and intensive.

 The principle of eliminating the hot cracking tendency of new materials is as follows: The Cu-rich phase is formed due to the increase of copper content in the alloy, and the Cu-rich phase is dispersed as a high-melting-point fine-grained phase in the form of a metal compound, which effectively offsets the crystal during melt crystallization. The Cu-rich solute in the grain has a strong tendency to diffuse to the grain boundary due to the sharp increase in supersaturation, thereby slowing down the structural stress during crystallization; at the same time, the Cu-rich phase and R (Be, Co, Cr, Li) , Mo, Nb, Ni, W) characteristic microalloying elements, RE rare earth microalloying elements and various dispersed phases of elements such as Mn, Zr, Ti, B, etc., all have refined grains, filled matrix grain boundaries, and formed The multiple effects of near-aluminum potential metal compounds, all of which significantly weaken the surface tension of the melt and reduce the melt viscosity, thereby significantly improving melt flow and casting properties of the alloy, ensuring a higher cast product. Pass rate.

 The principle of good recyclability of old materials is: In the present invention, the multi-microalloying effect has long-lasting property and remelting stability. When remelting, the structural characteristics of the melt maintain the atomic group structure and fineness formed by the primary alloy melt. Crystal structure, a large number of active crystal nuclei can fully play the role of agglomeration and assimilation of microcrystalline structure in the melt, and can maintain the original fluidity. Therefore, the incorporation of IH materials has a good effect of stabilizing the strength of the material and improving the ductility.

 This property of the old material can be completely reused at the production site. Whether it is slag, machining residue or unqualified casting, it can be smelted together with the new material or directly added to the melt.

 The characteristics of the present invention are significantly improved compared with the currently widely used 1XXX series and 2XXX series high-strength aluminum alloy materials, and the amount of waste products is greatly reduced, so that no large waste yard is required at the production site (in actual production, Aluminum alloy foundry often has to plan a large waste dumping site. At the same time, many cast aluminum alloys do not have remelting stability and cannot be reused directly on site. Therefore, batch processing is required for centralized processing, which occupies a large manufacturing cost. , a series of processing links and invalid labor are derived; and all the additional links, costs and invalid labor can be omitted by applying the new materials provided by the present invention.

 6, excellent processing, surface anti-corrosion treatment performance. By testing new materials into finished parts of various shapes such as shafts, balls, tubes, angles, bolts, etc., it is proved that the material has excellent machinability, the surface can achieve near-mirror degree of cleanliness, and the light reflectance is high. In pure aluminum; surface oxidation and coating tests show that the surface thickness of the surface can be up to the standard requirements, the surface color is unchanged, and the adhesion of the coating to the oxidized surface is fully up to the standard of the resistance test.

7, excellent high temperature performance. The material has the characteristics of high-temperature aluminum alloy, which can reach a strength of more than 200Mpa at 400 °C, higher than the traditional high-temperature (heat-resistant) aluminum alloy material, which makes the new material can replace the aero-engine. The carcass is directly subjected to heat-resistant parts other than the high-temperature gas-burning parts. (For the principle of heat resistance, see Characteristic 4 "Scientific and economical formula". For the copper-rich phase, rare earth RE, high temperature and high activity heat resistant alloy elements Be, Co, Cr, Li, Mo, Nb, Ni, W, etc. Content).

 8, typical originality. This series of new materials was developed by the applicant after the breakthrough of the theoretical innovation of alloying. The verification of the excellent properties of the material is also the verification of the new alloying theory, and this theoretical breakthrough is currently unclear in all the literature. It has been recorded, so this series of new materials is an original and fundamental innovation in the international arena.

 Innovation of the invention

 Table 1 lists the elemental compositions of the 31 aluminum alloys which are similar in performance and use in one aspect of the invention. It can be seen that the present invention has the following innovations in comparison with existing various high copper content deformed aluminum alloys, heat resistant deformed aluminum alloys, and heat resistant cast aluminum alloys.

 First, the copper (Cu) content is allowed to be large in the range of 1 to 10%; at the same time, manganese (Mn) elements are combined to form various high-temperature strengthening phases. The second is to use rare earth RE as the basic micro-alloying element, and its content range is large, up to 5%, which can fully exert the degassing, slag removal, purification, grain refinement and metamorphism of rare earth RE in the alloy. Improve the mechanical properties and corrosion resistance of the alloy; the rare earth element RE has strong affinity for oxygen, sulfur, nitrogen and hydrogen, so its deoxidation, desulfurization, removal of hydrogen and nitrogen are strong, and RE is the surface. The active elements can be concentratedly distributed at the crystal interface to reduce the tensile force between the phases, because the work for forming the critical size crystal nucleus is reduced, and the number of crystal nuclei is increased, thereby refining the grains.

 Third, the restrictions on iron elements are relatively loose, allowing the content to be up to 0.5%, which opens up space for the use of general aluminum as a matrix for alloy casting.

 Fourth, the low melting point elements such as magnesium and zinc are not used as the material for producing the strengthening phase, and the decomposition and conversion of the reinforcing phase of the material at high temperature are avoided, thereby significantly increasing the high temperature strength of the material.

 The fifth is one of eight characteristic elements such as beryllium (Be), cobalt (Co), chromium (Cr), lithium (Li), molybdenum (Mo), niobium (Nb), nickel (Ni), and tungsten (W). Or a combination of any two of them, as a characteristic addition element of high-activity complex microalloying, can form a plurality of high-temperature strengthening phases in the melt, and at the same time have a function of a modifier to improve the room temperature and high-temperature strength of the alloy. The combination of titanium (Ti), boron (B), and zirconium (Zr) elements as a comprehensive grain refiner, and cadmium (Cd) as a catalyst and lubricant for strengthening the phase, make the alloy material have high strength, high toughness and heat resistance. And the material base of all excellent properties such as high melt flow.

 The above are the five most obvious aspects of the feature formulation of the present invention.

Table 1 Chemical compositions of various aluminum alloys related to the present invention High copper content deformed aluminum alloy, heat resistant deformation aluminum alloy, heat resistant cast aluminum alloy and the composition of the present invention 1. High copper content deformed aluminum alloy

Preface /

Mouth Si Fe Cu Mn Mg Zn Ti B Zr V

 Name.

 5. 2 0. 15 0. 20

 1 2001 0. 20 0. 20 0. 10 0. 20 0. 05 0. 05 Ni ; 0. 10 Cr

 6. 0 0. 50 0. 45

 5. 5 0. 30

 2 2004 0. 20 0. 20 0. 10 0. 50 0. 10 0. 20

 6. 5 0. 50

 5. 0

 3 2011 0. 40 0. 7 0. 30

 6. 0

 4. 5

 4 2011A 0. 40 0. 50 0. 30

 6. 0

 5. 0

 5 2111 0. 40 0. 7 0. 30

 6. 0

 5. 8 0. 20 0. 02 0. 1 0. 05

 6 2219 0. 20 0. 30 0. 02 0. 10

 6. 8 0. 40 0. 10 0. 25 0. 15

 5. 8 0. 20 0. 10 0. 1 0. 05

 7 2319 0. 20 0. 30 0. 02 0. 10

 6. 8 0. 40 0. 20 0. 25 0. 15

 5. 8 0. 20 0. 20 0. 1 0. 05

 8 2419 0. 15 0. 15 0. 02 0. 10

 6. 8 0. 40 0. 10 0. 25 0. 15

 5. 3 0. 10 0. 05 0. 02 0. 1 0. 05

 9 2519 0. 25 0. 30 0. 10

 6. 4 0. 50 0. 40 0. 10 0. 25 0. 15

 5. 3 0. 20 0. 02 0. 1 0. 05

 10 2021 0. 20 0. 30 0. 02 0. 10

 6. 6 0. 40 0. 10 0. 25 0. 15

 6. 0 0. 40

 0. 1~

 11 2A16 0. 30 0. 30 0. 05 0. 10

 0. 2

 7. 0 0. 8

 5. 8 0. 20 0. 1 0. 05

 0. 08

 12 2B16 0. 25 0. 30 0. 05

 ~0. 2

 6. 8 0. 4 0. 25 0. 15

 6. 0 0. 40 0. 25

 0. 1~

 13 2A17 0. 30 0. 30 0. 10

 0. 2

 7. 0 0. 8 0. 45

 5. 8 0. 07 0. 001 0. 1 0. 05

 14 2A20 0. 20 0. 30 0. 02 0. 10

 6. 8 0. 16 0. 01 0. 25 0. 15 2. Heat-resistant high-strength deformation aluminum alloy

Preface /

Mouth Si Fe Cu Mn Mg Zn Ti B Zr V

 Name.

 1 2A01 0. 5 0. 5 2. 2~3. 0 0. 2 0. 2~0. 5 0. 1 0. 15

 2 2A02 0. 3 0. 3 2. 6~3. 2 0. 45~0. 7 2. 0~2. 4 0. 1 0. 15

3 2A10 0. 25 0. 2 3. 9~4. 5 0. 3~0. 5 0. 15~0. 3 0. 1 0. 15

 Comparison of mechanical properties

The Applicant compares the present invention with the mechanical properties of several existing high strength and toughness aluminum alloys, as shown in Table 2. Table 2 Mechanical properties of the present invention and several high strength and tough cast aluminum alloys Alloy code casting method heat treatment state tensile strength σ _b MPa elongation δ ₅ % hardness HBS

 S T4 365~370 17~: L9 100

 ZL201A

 S T5 440~470 8~15 120

 S Τ 5 480 13 120

 ZL205A S Τ6 510 7 140

 S Τ7 495 3. 4 130

 High toughness 205A J Τ5 385~405 19~23

 206. 0® S Τ7 435 11. 7 90

 S Τ6 460 5. 0 135

 K0-1 J Τ6 460 9. 0

 R Τ5 358~450 4. 0~7. 0

 ZL107A J Τ5 420~470 4~6

 The invention J, s Τ 6 480-540 3~8 140

1%。 The data listed in the high-purity 206. 0 alloy, namely W (Si) 0. 05%, W (Fe) 0. 10%. S-sand casting, J-metal casting, R-solder casting

 It can be seen from Table 2 that the tensile strength of the present invention is 480 to 540 MPa, and the hardness is greater than that of HB140, which is obviously superior to the mechanical properties of the existing high-strength and tough aluminum alloy.

 3, high temperature performance

 The applicant tested the strength and high temperature durability of the present invention under various temperature conditions, and compared with the high temperature durability of the existing common heat resistant aluminum alloy, as shown in Table 3.

 Table 3 High temperature and long-lasting performance of the invention and common heat-resistant aluminum alloy

It can be seen from Table 3 that the room temperature strength of the present invention is greater than 450 MPa, and the high temperature strength is above 300 MPa at a temperature of 250 ° C. When the strength is 300 °C, the long-term performance of high temperature is more than 200 Mpa, which is obviously superior to the high temperature durability of the existing heat-resistant high-strength alloy.

 In summary, the novel high-strength heat-resistant aluminum alloy material of the invention has high-tech content, wide application fields and excellent market prospects, and its excellent cost performance makes it possible to replace almost all high-strength aluminum alloys and high-temperature aluminum alloys. , representing the development direction of light and strong structural materials in China and the world. detailed description

 Example 1 : Cu-1. 0%, characteristic microalloying element _Be, Cr, basic microalloyed rare earth element - 镧 La

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and the rare earth element La, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 535Mpa, elongation 8%.

 Actual deletion 2: Cu-4. 2%, characteristic microalloying elements - Be, Cr, basic microalloyed rare earth elements - La, Ce mixed rare earth

(1) Weigh the various alloying elements required according to the ingredient calculation table, such as -

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

(3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal addition according to the formula ratio. Adding agent (including salt compound), after adding evenly, add Cu pure metal and Al-Cd intermediate alloy or mixed metal additive, then add B and rare earth elements La, Ce mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 515Mpa, elongation 6. 2%.

Example 3: Cu-6. 01%, characteristic microalloying element _Be, Cr, basic microalloyed rare earth element _La, Ce, Pr mixed rare earth

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth elements La, Ce, Pr mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

(7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours. (8) Sample index: tensile strength 535Mpa, elongation 5%.

 Example 4: Cu-8%, characteristic microalloying element -Be, Cr, basic microalloying rare earth element - 钕Nd

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Nd, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 523Mpa, elongation 4%.

 Example 5: Cu-7%, characteristic microalloying element -Be, Cr, basic microalloying rare earth element - 铒 Er

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Er, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6. (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 535Mpa, elongation 4.7%.

 Example 6: Cu-10. 0%, characteristic microalloying element _Be, Cr, basic microalloyed rare earth element _Y

(1) Calculate the various alloying elements required for the weighing according to the following ingredients, as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Be, Al_Cr, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Y, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, hafnium, chromium, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 485Mpa, elongation 3%.

Example 7: Cu-1. 0%, characteristic microalloying element-Co, Ni, basic microalloying rare earth element-镧La

(2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside. (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and the rare earth element La, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 485Mpa, elongation 7.5%.

Example 8: Cu-4. 2%, characteristic microalloying element-Co, Ni, basic microalloying rare earth element La, Ce mixed rare earth (1) Weigh various alloying elements required according to the ingredients calculation table, as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth elements La, Ce mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

(7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours. (4) The sample index: tensile strength 538Mpa, elongation 7.4%.

Example 9: Cu-5. 1%, characteristic microalloying element-Co, Ni, basic microalloying rare earth element Eu

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and the rare earth element Eu, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 503Mpa, elongation 6.1%.

 Example 10: Cu-6. 01%, characteristic microalloying element _Co, Ni, basic microalloyed rare earth element _La, Ce, Pr mixed rare earth

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth elements La, Ce, Pr mixed rare earth, and stir evenly.

Mixed metal additive refers to a cake or block non-sintered powder metallurgy product for adding and adjusting alloy components, including A mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 533Mpa, elongation 7. 1%

Example 11: Cu-6. 5%, characteristic microalloying element-Co, Ni, basic microalloying rare earth element 铒Er

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth element Er, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine gas, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 527Mpa, elongation 6.9%.

 Example 12: Cu-7%, characteristic microalloying element -Co, Ni, basic microalloying rare earth element 钕Nd

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows. Element Aluminum Al Copper Cu Manganese Mn Cadmium Cd Zirconium Zr Cobalt Co 镊Ni Titanium Ti Rare Earth Nd Boron B Mass (g) 10841 840 60 48 100 12 12 60 12 15 Total 12000 (g)

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth element Nd, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 517Mpa, elongation 5. 2%.

 Example 13: Cu-8%, characteristic microalloying element -Co, Ni, basic microalloying rare earth element 铈 Ce

(1) The amount of alloying elements, under.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth element Ce, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. The flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1 and N A1F ₆ .

(4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, while preventing the melt Inhalation of water and burning, melt refining should be carried out in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, on-line degassing, slag removal treatment

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 501Mpa, elongation 4.8%.

 Example 14: Cu-10%, characteristic microalloying element -Co, Ni, basic microalloyed rare earth element 钇 Y

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to melt completely and keep it at 700~80 (TC); to prevent the melt from inhaling excessive air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Co, Al_Ni, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mix the metal additive, add B and rare earth element Y, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, cobalt, nickel, boron or titanium metal powder and a flux. The flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1 and Na ₃ AlF ₆ .

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 487Mpa, elongation 4.3%.

Example 15: Cu-1. 0%, characteristic microalloying element _Li, Nb, basic microalloying rare earth element - 镧La

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

(3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd intermediate alloy or Mixed metal additives, Add B and rare earth element La, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 485Mpa, elongation 7.5%.

Example 16: Cu-4. 2%, characteristic microalloying element-Li, Nb, basic microalloyed rare earth element La, Ce mixed rare earth (1) Weigh various alloying elements required according to the ingredients calculation table, as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth elements La, Ce mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. The flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1 and N A1F ₆ .

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 538Mpa, elongation 7. 4%.

Example 17: Cu-5. 1%, characteristic microalloying element - Li, Nb, basic microalloyed rare earth element Eu (1) Under the amount of alloying elements, under.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and the rare earth element Eu, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 503Mpa, elongation 6.1%.

 Example 18: Cu-6. 01%, characteristic microalloying element _Li, Nb, basic microalloyed rare earth element _La, Ce, Pr mixed rare earth

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth elements La, Ce, Pr mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

(4) then in-furnace refining of the above alloy melt; adding a refining agent to the alloy melt (can be used according to different working conditions) Chlorine, hexachloroethane, manganese chloride, etc. as refining agents, and boron salt modifiers, etc., and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible. .

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 533Mpa, elongation 7. 1%

Example 19: Cu-6. 5%, characteristic microalloying element _Li, Nb, basic microalloying rare earth element 铒Er

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Er, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 527Mpa, elongation 6.9%.

 Example 20: Cu-7%, characteristic microalloying element -Li, Nb, basic microalloyed rare earth element 钕Nd

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

(3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal addition according to the formula ratio. Additives (including salt compounds), stir evenly, then add Cu pure metal and Al-Cd master alloy or mixed metal additive, then add B and rare earth element Nd, stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 517Mpa, elongation 5. 2%.

 Example 21: Cu-8%, characteristic microalloying element -Li, Nb, basic microalloying rare earth element 铈 Ce

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Ce, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

8%。 (8) Sample index: tensile strength 501Mpa, elongation of 4.8%. Example 22: Cu-10%, characteristic microalloying element _Li, Nb, basic microalloyed rare earth element 钇Y

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Li, Al_Nb, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Y, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, lithium, lanthanum, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 487Mpa, elongation 4.3%.

 Example 23: Cu-1. 0%, characteristic microalloying element -Mo, W, basic microalloyed rare earth element - 镧 La

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr master alloy or mixed metal additive (including salt compound) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and the rare earth element La, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

(4) then in-furnace refining of the above alloy melt; adding a refining agent to the alloy melt (can be used according to different working conditions) Chlorine, hexachloroethane, manganese chloride, etc. as refining agents, and boron salt modifiers, etc., and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible. .

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 485Mpa, elongation 7.5%.

Example 24: Cu-4. 2%, characteristic microalloying element-Mo, W, basic microalloying rare earth element La, Ce mixed rare earth (1) Weigh various alloying elements required according to the ingredients calculation table, as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth elements La, Ce mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 538Mpa, elongation 7. 4%.

 Example 25: Cu-5. 1%, characteristic microalloying element -Mo, W, basic microalloyed rare earth element Eu

(1) Calculate the various alloying elements required for the weighing according to the following ingredients, as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

(3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr master alloy or mixed metal first according to the formula ratio. The agent (including the salt compound), after stirring evenly, add Cu pure metal and Al-Cd intermediate alloy or mixed metal additive, then add B and rare earth element Eu, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 503Mpa, elongation 6.1%.

 Example 26: Cu-6. 01%, characteristic microalloying element -Mo, W, basic microalloyed rare earth element _La, Ce, Pr mixed rare earth

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth elements La, Ce, Pr mixed rare earth, and stir evenly.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

(7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours. (1) The sample index: tensile strength 533Mpa, elongation 7.1%.

 Example 27: Cu-6. 5%, characteristic microalloying element -Mo, W, basic microalloyed rare earth element 铒 Er

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Er, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

 (6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 527Mpa, elongation 6.9%.

 Example 28: Cu-7%, characteristic microalloying element -Mo, W, basic microalloying rare earth element 钕Nd

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Nd, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6. (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 517Mpa, elongation 5. 2%.

 Example 29: Cu-8%, characteristic microalloying element -Mo, W, basic microalloying rare earth element 铈 Ce

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

 (2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside.

 (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Ce, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: Tensile strength 501Mpa, elongation 4.8%.

 Example 30: Cu-10%, characteristic microalloying element -Mo, W, basic microalloyed rare earth element 钇 Y

(1) Weigh the various alloying elements required according to the ingredient calculation table as follows.

(2) Add an appropriate amount of aluminum ingot to the smelting furnace, heat it to completely melt and keep it at 700~800 °C; to prevent the melt from inhaling too much air, the melting process should be as short as possible and closed. Completed inside. (3) Add Al-Mn, Al-Ti, Al_Mo, A1_W, Al_Zr intermediate alloy or mixed metal additive (including salt compound) according to the formula ratio, stir evenly, then add Cu pure metal and Al-Cd master alloy or Mix the metal additive, add B and rare earth element Y, and mix well.

The mixed metal additive refers to a cake-like or massive non-sintered powder metallurgy product for adding and adjusting an alloy component, which comprises a mixture of manganese, copper, zirconium, molybdenum, tungsten, boron or titanium metal powder and a flux. Flux refers to a mixture of alkali metal or alkaline earth metal halide salts, including NaCl, KC1, and N¾A1F _6.

 (4) Then, the above alloy melt is subjected to in-furnace refining; a refining agent is added to the alloy melt (chlorine, hexachloroethane, manganese chloride, etc. may be used as a refining agent according to different working conditions, and a boron salt modifier, etc.) ), and stir evenly, and to prevent the melt from inhaling moisture and burning, the melt refining should be operated in a closed environment as much as possible.

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, and the gas is degassed and slag removed online.

(6) Casting (crystal solidification in a mold).

 (7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours.

 (8) Sample index: tensile strength 487Mpa, elongation 4.3%.

Claims

Claim K is a multi-component combination high-strength heat-resistant aluminum alloy material characterized in that: by weight percentage, the alloy composition is Cu: L 0~10· 0%, Μη: 0· 05~1· 5% , Cd: 0· 01~0· 5%, Ti : 0· 01~0· 5%, Β: 0·01~0·2%, Zr: 0.01~1.0%, R: 0.001~3% or 1^ + : 0.001 to 3%, rare earth element RE: 0.05 to 5%, and the balance is Al. 2. The multi-component combination high-strength heat-resistant aluminum alloy material according to claim 1, wherein the characteristic metal elements R, Ri R2 comprise: Be, Co, Cr, Li, Mo, b, Ni, W, 8 elements. 3. The multi-component combination high-strength heat-resistant aluminum alloy material according to claim 1, wherein the rare earth element RE is a single rare earth element or one or more mixed rare earth elements. 4. The multi-component combination high strength heat resistant aluminum alloy material according to claim 1, wherein the rare earth element RE comprises La, Ce, Pr, Nd, Er, Y and Sc. A method for preparing a multi-component combination high-strength heat-resistant aluminum alloy material according to any one of claims 1 to 4, which comprises the following steps:

 (1) Within the above element ratio range, select a set of element ratios, and then calculate the mass of each elemental metal required, or the quality of the intermediate alloy, or the quality of the mixed metal additive, according to the total amount of the alloy to be formulated. , prepare the alloy production ingredient list, and select the preparation materials according to the ingredient list;

 (2) adding an appropriate amount of aluminum ingot or molten aluminum liquid to the smelting furnace, heating to completely melt and maintaining at 700~800 ° C; the melting process is completed in a closed environment;

(3) Add Mn, Ti, Zr, R, R ₂ pure metal or Al_Mn, Al-Ti, Al-Zr, Al-R, AI-RL Al-R ₂ intermediate alloy or mixed metal additive according to the formula ratio. After stirring evenly, add Cu, Cd pure metal or Al-Cu, Al-Cd intermediate alloy or mixed metal additive, then add B and rare earth element RE, and stir evenly;

 (4) then in-furnace refining the above alloy melt; adding a refining agent to the alloy melt, stirring uniformly, and melt refining is operated in a closed environment;

 (5) After refining, slag, static, and temperature adjustment to 630~850 °C, the alloy liquid is poured out of the furnace, on-line degassing and slag removal treatment;

(6) casting;

(7) The casting is subjected to a solution treatment at 470 to 560 ° C for 30 hours. The method for preparing a multi-component combination high-strength heat-resistant aluminum alloy material according to claim 5, wherein: the mixed metal additive refers to a cake-like or massive non-sintering powder metallurgy for adding and adjusting alloy components. product.

The method for preparing a multi-component combination high-strength heat-resistant aluminum alloy material according to claim 6, wherein the powder metallurgy product comprises manganese, copper, zirconium, R, Ri R ₂ , boron or titanium metal powder and flux. Mixed.

The method according to claim 7, wherein the flux refers to a mixture of alkali metal or alkaline earth metal halogen salts, including NaCl, KC PN3⁄4A1F ₆ .

 9. The method according to claim 5, wherein in the step (4), the refining agent refers to chlorine gas, hexachloroethane, manganese chloride and boron salts. Deteriorating agent.