US20090041615A1 - Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties - Google Patents
Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties Download PDFInfo
- Publication number
- US20090041615A1 US20090041615A1 US12/173,983 US17398308A US2009041615A1 US 20090041615 A1 US20090041615 A1 US 20090041615A1 US 17398308 A US17398308 A US 17398308A US 2009041615 A1 US2009041615 A1 US 2009041615A1
- Authority
- US
- United States
- Prior art keywords
- less
- alloy
- balance
- cast
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 67
- 239000000956 alloy Substances 0.000 title claims abstract description 67
- 239000000203 mixture Substances 0.000 title claims abstract description 36
- 238000005260 corrosion Methods 0.000 title abstract description 9
- 230000007797 corrosion Effects 0.000 title abstract description 9
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 23
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 21
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 20
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 20
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 20
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 20
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 20
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 20
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 19
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 19
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 19
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 19
- 238000005050 thermomechanical fatigue Methods 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 229910000601 superalloy Inorganic materials 0.000 abstract description 3
- 238000007792 addition Methods 0.000 description 18
- 239000011651 chromium Substances 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 239000011593 sulfur Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910001011 CMSX-4 Inorganic materials 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- -1 Yftrium (Y) Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Definitions
- This invention relates in general to the field of nickel base superalloys possessing improved oxidation resistance, corrosion resistance, castability, and mechanical properties such as creep resistance and thermo-mechanical fatigue resistance.
- the present invention relates to alloys that may be cast as a single crystal or directionally solidified.
- Nickel base superalloys are alloys composed primarily of nickel with the addition of several other elements selected for their ability to survive an overall high temperature, high stress, and highly oxidative environment. Typically, this environment is that of a gas turbine engine.
- FIG. 1 illustrates comparative creep testing of embodiments of the present invention (called Alloys A and B) and a prior art alloy PWA 1483.
- FIG. 2 is a micrograph of Alloy A, after elevated temperature exposure to a thermally oxidized coal derived syngas test environment.
- FIG. 3 is a micrograph of Alloy B, after elevated temperature exposure to a thermally oxidized coal derived syngas test environment.
- FIG. 4 is a micrograph of the prior art alloy SieMet DS (PWA 1483 modified with grain boundary strengthening elements) after elevated temperature exposure to a thermally oxidized coal derived syngas test environment.
- FIG. 5 is a micrograph of another prior art alloy CM247LC after elevated temperature exposure to a thermally oxidized coal derived syngas test environment.
- the present invention provides an alloy composition that may be cast as a single crystal alloy or may be directionally solidified, and that has better castability than the prior art alloy available from Cannon-Muskegon Corporation under the registered trademark CMSX-4, has better corrosion resistance than alloy CM247LC available from that same source, and has better mechanical properties than the prior art alloy available through United Technologies Corporation under the trademark PWA 1483.
- Typical weight percent compositions of these prior art alloys are shown in Table 1.
- novel alloy compositions disclosed herein offer an improved set of properties that are particularly useful for application in Integrated Gasification Combined Cycle (IGCC) syngas fired gas turbines where relatively low quality fuels and high operating temperatures result in a highly corrosive environment.
- IGCC Integrated Gasification Combined Cycle
- Alloys of the present invention include Chromium (Cr) from 8-12 weight percent or about 10 weight percent to provide the compositions with a desired level of high temperature corrosion resistance.
- Alloys of the present invention may include Aluminum (Al) at a concentration that is lower than is generally observed in highly oxidation resistant alloys, for example as low as 2 weight percent or in the range of 2.0-5.5 weight percent.
- Rare earth elements, Yftrium (Y), Silicon (Si), and Hafnium (Hf) are included to compensate for the reduction in Aluminum (Al) and to provide increased oxidation resistance.
- the alloy compositions disclosed herein have intentional additions of rare earth elements Lanthanum (La), Yttrium (Y), Gadolinium (Gd), Praseodymium (Pr), Dysprosium (Dy), Neodymium (Nd), and Erbium (Er) in combined amounts of up to 0.1 weight percent.
- These rare earth additions provide improved oxidation resistance of the inventive alloys and enhance the compatibility of the alloy compositions with various coatings.
- the rare earth additions also aid in increasing the life of any overlying protective ceramic coating.
- the increase in coating life through the addition of rare earth elements is attributed to their ability to form sulfides and oxi-sulfides that reduce the residual Sulfur (S) content and prevent the diffusion of sulfur atoms to the alumina scale that is formed at the boundary between the coating and the substrate alloy.
- Silicon (Si) is intentionally added to the present alloys to support the formation of a protective silicon dioxide surface oxide layer.
- the silicon dioxide provides enhanced oxidation resistance as the film is less susceptible to cracking compared with other protective oxide films. Excessive additions of silicon are detrimental to the performance of the alloy; consequently, an addition of less than 0.15 weight percent or in the range of 0.05-0.2 weight percent is preferred.
- Hafnium (Hf) at levels similar to those of Silicon or less than 0.5 weight percent serves to further enhance the oxidation resistance.
- An alloy composition consisting essentially of, by weight percent, 8-12% Cr, 10-14% Co, 0.3-0.9% Mo, 3-7% W, 2-8% Ta, 2.0-5.5% Al, 1.5-5.0% Ti, up to 2% Nb, less than 0.1% B, less than 0.1% Zr, 0.05-0.15% C, less than 0.5% Hf, 2-4% Re, 0.05-0.2% Si, up to 0.015% S (without intentional sulfur addition), up to 0.1% La, up to 0.1% Y, up to 0.1% Ce, up to 0.1% Nd, up to 0.1% Dy, up to 0.1% Pr, up to 0.1% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is 0.001-0.1%, provides for an overall range of alloys that exhibit creep resistance, thermo-mechanical fatigue resistance, corrosion resistance, and the ability to be cast as a single crystal or directionally solidified alloy. All compositions herein are specified in weight percent values unless specified otherwise.
- compositions of this invention may be cast with processes known in the art.
- FIG. 1 is a comparison of the creep properties of two embodiments of the present invention with those of prior art PWA 1483. The test was conducted at a temperature of 850° C. Alloy A has increased refractory metal content and the addition of 3 weight percent Rhenium (Re), as shown in Table 2. Alloy A is an example of an embodiment of the alloy composition that is designed to be cast as a single crystal and have improved thermo-mechanical fatigue resistance at the expense of some creep resistance. Alloy B is an example of an embodiment of the alloy composition that is designed to be cast as a single crystal and have improved creep resistance at the expense of some thermo-mechanical fatigue resistance.
- Re 3 weight percent Rhenium
- FIGS. 2-5 are Scanning Electron Microscope (SEM) slides that show various alloys after exposure to the same thermally oxidized coal derived syngas environment at about 1,000° C. Both of the novel alloys ( FIGS. 2-3 ) have survived the environment and Alloy B ( FIG. 3 ) shows particularly good condition with little evidence of corrosive attack.
- the Siemet DS (PWA 1483 modified with grain boundary strengthening elements) shows sub-surface penetration as seen in FIG. 4 and the protective oxide has spalled on the CM247LC as seen in FIG. 5 .
Abstract
Description
- This application claims benefit of the 10 Aug. 2007 filing date of U.S. Provisional Patent Application No. 60/955,092.
- This invention relates in general to the field of nickel base superalloys possessing improved oxidation resistance, corrosion resistance, castability, and mechanical properties such as creep resistance and thermo-mechanical fatigue resistance. The present invention relates to alloys that may be cast as a single crystal or directionally solidified.
- Nickel base superalloys are alloys composed primarily of nickel with the addition of several other elements selected for their ability to survive an overall high temperature, high stress, and highly oxidative environment. Typically, this environment is that of a gas turbine engine.
- The greatest difficulty encountered with the gas turbine environment is that the goals of creep resistance, thermo-mechanical fatigue resistance, and corrosion resistance are at odds with each other. Alloys with greater creep resistance typically sacrifice hot corrosion resistance and thermo-mechanical fatigue resistance. Alloys with greater hot corrosion resistance come at the expense of poor creep resistance and thermo-mechanical fatigue resistance.
- This invention is explained in the following description in view of the drawings that show:
-
FIG. 1 illustrates comparative creep testing of embodiments of the present invention (called Alloys A and B) and a prior art alloy PWA 1483. -
FIG. 2 is a micrograph of Alloy A, after elevated temperature exposure to a thermally oxidized coal derived syngas test environment. -
FIG. 3 is a micrograph of Alloy B, after elevated temperature exposure to a thermally oxidized coal derived syngas test environment. -
FIG. 4 is a micrograph of the prior art alloy SieMet DS (PWA 1483 modified with grain boundary strengthening elements) after elevated temperature exposure to a thermally oxidized coal derived syngas test environment. -
FIG. 5 is a micrograph of another prior art alloy CM247LC after elevated temperature exposure to a thermally oxidized coal derived syngas test environment. - The present invention provides an alloy composition that may be cast as a single crystal alloy or may be directionally solidified, and that has better castability than the prior art alloy available from Cannon-Muskegon Corporation under the registered trademark CMSX-4, has better corrosion resistance than alloy CM247LC available from that same source, and has better mechanical properties than the prior art alloy available through United Technologies Corporation under the trademark PWA 1483. Typical weight percent compositions of these prior art alloys are shown in Table 1.
-
TABLE 1 CMSX-4 PWA 1483 CM247LC Min Max Min Max Min Max Co 9.3 10.0 8.5 9.5 9.0 9.5 Cr 6.4 6.6 11.6 12.7 8.0 8.5 Ti 0.9 1.1 3.9 4.25 0.6 0.9 Al 5.4 5.75 3.4 3.8 5.4 5.7 Ta 6.3 6.75 4.8 5.2 3.1 3.3 Mo 0.5 0.7 1.65 2.15 0.4 0.6 W 6.2 6.6 3.5 4.1 9.3 9.7 Hf 0.07 0.12 0 75 ppm 1.0 1.6 Re 2.8 3.1 — — — — C 0 60 ppm 0.05 0.09 0.07 0.08 B 0 25 ppm 0 30 ppm .01 .02 Zr 0 75 ppm 0 75 ppm .005 0.02 - The novel alloy compositions disclosed herein offer an improved set of properties that are particularly useful for application in Integrated Gasification Combined Cycle (IGCC) syngas fired gas turbines where relatively low quality fuels and high operating temperatures result in a highly corrosive environment.
- Alloys of the present invention include Chromium (Cr) from 8-12 weight percent or about 10 weight percent to provide the compositions with a desired level of high temperature corrosion resistance.
- Alloys of the present invention may include Aluminum (Al) at a concentration that is lower than is generally observed in highly oxidation resistant alloys, for example as low as 2 weight percent or in the range of 2.0-5.5 weight percent. Rare earth elements, Yftrium (Y), Silicon (Si), and Hafnium (Hf) are included to compensate for the reduction in Aluminum (Al) and to provide increased oxidation resistance.
- The alloy compositions disclosed herein have intentional additions of rare earth elements Lanthanum (La), Yttrium (Y), Gadolinium (Gd), Praseodymium (Pr), Dysprosium (Dy), Neodymium (Nd), and Erbium (Er) in combined amounts of up to 0.1 weight percent. These rare earth additions provide improved oxidation resistance of the inventive alloys and enhance the compatibility of the alloy compositions with various coatings. The rare earth additions also aid in increasing the life of any overlying protective ceramic coating. The increase in coating life through the addition of rare earth elements is attributed to their ability to form sulfides and oxi-sulfides that reduce the residual Sulfur (S) content and prevent the diffusion of sulfur atoms to the alumina scale that is formed at the boundary between the coating and the substrate alloy.
- Silicon (Si) is intentionally added to the present alloys to support the formation of a protective silicon dioxide surface oxide layer. The silicon dioxide provides enhanced oxidation resistance as the film is less susceptible to cracking compared with other protective oxide films. Excessive additions of silicon are detrimental to the performance of the alloy; consequently, an addition of less than 0.15 weight percent or in the range of 0.05-0.2 weight percent is preferred.
- The intentional addition of Hafnium (Hf) at levels similar to those of Silicon or less than 0.5 weight percent serves to further enhance the oxidation resistance.
- An alloy composition consisting essentially of, by weight percent, 8-12% Cr, 10-14% Co, 0.3-0.9% Mo, 3-7% W, 2-8% Ta, 2.0-5.5% Al, 1.5-5.0% Ti, up to 2% Nb, less than 0.1% B, less than 0.1% Zr, 0.05-0.15% C, less than 0.5% Hf, 2-4% Re, 0.05-0.2% Si, up to 0.015% S (without intentional sulfur addition), up to 0.1% La, up to 0.1% Y, up to 0.1% Ce, up to 0.1% Nd, up to 0.1% Dy, up to 0.1% Pr, up to 0.1% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is 0.001-0.1%, provides for an overall range of alloys that exhibit creep resistance, thermo-mechanical fatigue resistance, corrosion resistance, and the ability to be cast as a single crystal or directionally solidified alloy. All compositions herein are specified in weight percent values unless specified otherwise.
- The alloy composition from the above, but with the following ranges: 2-6% Ta, 2-5% Al, and 3-5% Ti, is selected to optimize its thermo-mechanical fatigue resistance.
- The alloy composition from the above, but with the following ranges: 4-8% Ta, 3.5-5.5% Al, and 1.5-4.0% Ti, is selected to optimize its creep resistance.
- The alloy composition from the above, but with the following ranges: 9.5-10.5% Cr, 11.5-12.5% Co, 0.45-0.75% Mo, 4.4-5.4% W, 3.4-4.4% Ta, 3.1-4.0% Al, 3.9-4.25% Ti, up to 0.5% Nb, less than 0.02% B, less than 0.02% Zr, 0.05-0.11% C, less than 0.25% Hf, 2.5-3.5% Re, 0.1-0.15% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.05% La, up to 0.05% Y, up to 0.05% Ce, up to 0.05% Nd, up to 0.05% Dy, up to 0.05% Pr, up to 0.05% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is 0.01-0.05%, is selected for its thermo-mechanical fatigue resistance, ability to be cast as a single crystal alloy.
- The alloy composition from the above, but with the following ranges: 9.5-10.5% Cr, 11.5-12.5% Co, 0.45-0.75% Mo, 4.4-5.4% W, 3.4-4.4% Ta, 3.1-4.0% Al, 3.9-4.25% Ti, up to 0.5% Nb, 0.005-0.015% B, up to 0.02% Zr, 0.05-0.11% C, less than 0.25% Hf, 2.5-3.5% Re, 0.1-0.15% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.05% La, up to 0.05% Y, up to 0.05% Ce, up to 0.05% Nd, up to 0.05% Dy, up to 0.05% Pr, up to 0.05% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is 0.01-0.05%, is selected for its thermo-mechanical fatigue resistance, ability to be cast as a directionally solidified alloy.
- The alloy composition from the above, but with the following ranges: 9.5-10.5% Cr, 11.5-12.5% Co, 0.45-0.75% Mo, 4.4-5.4% W, 5.5-6.5% Ta, 4.2-4.8% Al, 2.0-2.8% Ti, up to 0.5% Nb, less than 0.02% B, less than 0.02% Zr, 0.05-0.11% C, less than 0.25% Hf, 2.5-3.5% Re, 0.1-0.15% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.05% La, up to 0.05% Y, up to 0.05% Ce, up to 0.05% Nd, up to 0.05% Dy, up to 0.05% Pr, up to 0.05% Gd, balance is Ni, and wherein (La+Y+Ce+Nd +Dy+Pr+Gd) is 0.01-0.05%, is selected for its creep resistance, ability to be cast as a single crystal alloy.
- The alloy composition from the above, but with the following ranges: 9.5-10.5% Cr, 11.5-12.5% Co, 0.45-0.75% Mo, 4.4-5.4% W, 5.5-6.5% Ta, 4.2-4.8% Al, 2.0-2.8% Ti, up to 0.5% Nb, 0.005-0.015% B, less than 0.02% Zr, 0.05-0.11% C, less than 0.25% Hf, 2.5-3.5% Re, 0.1-0.15% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.05% La, up to 0.05% Y, up to 0.05% Ce, up to 0.05% Nd, up to 0.05% Dy, up to 0.05% Pr, up to 0.05% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is 0.01-0.05%, is selected for its creep resistance, ability to be cast as a directionally solidified alloy.
- The alloy composition from the above, but with the following ranges: 10.0% Cr, 12.0% Co, 0.6% Mo, 4.9% W, 3.9% Ta, 3.5% Al, 3.9% Ti, less than 0.01% B, less than 0.01% Zr, 0.07% C, less than 0.1% Hf, 3.0% Re, less than 0.12% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.02% La, up to 0.02% Y, up to 0.02% Ce, up to 0.02% Nd, up to 0.02% Dy, up to 0.02% Pr, up to 0.02% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is between 150 and 400 ppm, is selected for its thermo-mechanical fatigue resistance, ability to be cast as a single crystal alloy.
- The alloy composition from the above, but with the following ranges: 10.0% Cr, 12.0% Co, 0.6% Mo, 4.9% W, 3.9% Ta, 3.5% Al, 3.9% Ti, 0.01% B, 0.0075% Zr, 0.09% C, 0.1% Hf, 3.0% Re, less than 0.12% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.02% La, up to 0.02% Y, up to 0.02% Ce, up to 0.02% Nd, up to 0.02% Dy, up to 0.02% Pr, up to 0.02% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is between 150 and 400 ppm, is selected for its thermo-mechanical fatigue resistance, ability to be cast as a directionally solidified alloy.
- The alloy composition from the above, but with the following ranges: 10.0% Cr, 12.0% Co, 0.6% Mo, 4.9% W, 6.0% Ta, 4.5% Al, 2.4% Ti, less than 0.01% B, less than 0.01% Zr, 0.07% C, less than 0.1% Hf, 3.0% Re, less than 0.12% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.02% La, up to 0.02% Y, up to 0.02% Ce, up to 0.02% Nd, up to 0.02% Dy, up to 0.02% Pr, up to 0.02% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is between 150 and 400 ppm (0.015%-0.04%), is selected for its creep resistance, ability to be cast as a single crystal alloy.
- The alloy composition from the above, but with the following ranges: 10.0% Cr, 12.0% Co, 0.6% Mo, 4.9% W, 6.0% Ta, 4.5% Al, 2.4% Ti, 0.01% B, 0.0075% Zr, 0.09% C, 0.1% Hf, 3.0% Re, less than 0.12% Si, up to 0.015% S (again with no intentional sulfur addition), up to 0.02% La, up to 0.02% Y, up to 0.02% Ce, up to 0.02% Nd, up to 0.02% Dy, up to 0.02% Pr, up to 0.02% Gd, balance is Ni, and wherein (La+Y+Ce+Nd+Dy+Pr+Gd) is between 150 and 400 ppm (0.015%-0.04%), is selected for its creep resistance, ability to be cast as a directionally solidified alloy.
- The compositions of this invention may be cast with processes known in the art.
-
FIG. 1 is a comparison of the creep properties of two embodiments of the present invention with those of prior art PWA 1483. The test was conducted at a temperature of 850° C. Alloy A has increased refractory metal content and the addition of 3 weight percent Rhenium (Re), as shown in Table 2. Alloy A is an example of an embodiment of the alloy composition that is designed to be cast as a single crystal and have improved thermo-mechanical fatigue resistance at the expense of some creep resistance. Alloy B is an example of an embodiment of the alloy composition that is designed to be cast as a single crystal and have improved creep resistance at the expense of some thermo-mechanical fatigue resistance. -
TABLE 2 Exemplary Compositions (Weight percent). Alloy ID Ni Cr Co Mo W Re Ta Al Ti C Rare Earth Alloy A Bal. 10 12 0.6 4.9 3 3.9 3.5 3.9 0.07 0.03 Alloy B Bal. 10 12 0.6 4.9 3 6 4.5 2.4 0.07 0.03 PWA 1483 Bal. 12.2 9 1.9 3.8 — 5 3.6 4.2 0.07 — CMSX-4 Bal. 6.5 9.6 0.6 6.4 3 6.5 5.6 1 <0.006 — -
FIGS. 2-5 are Scanning Electron Microscope (SEM) slides that show various alloys after exposure to the same thermally oxidized coal derived syngas environment at about 1,000° C. Both of the novel alloys (FIGS. 2-3 ) have survived the environment and Alloy B (FIG. 3 ) shows particularly good condition with little evidence of corrosive attack. The Siemet DS (PWA 1483 modified with grain boundary strengthening elements) shows sub-surface penetration as seen inFIG. 4 and the protective oxide has spalled on the CM247LC as seen inFIG. 5 . - While various embodiments of the present invention have been shown and described herein, it will be obvious that such embodiments are provided by way of example only. Numerous variations, changes and substitutions may be made without departing from the invention herein. Accordingly, it is intended that the invention be limited only by the spirit and scope of the appended claims.
Claims (11)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/173,983 US20090041615A1 (en) | 2007-08-10 | 2008-07-16 | Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties |
AT08794827T ATE556154T1 (en) | 2007-08-10 | 2008-07-29 | CORROSION-RESISTANT NICKEL ALLOY COMPOSITIONS WITH INCREASED CASTABILITY AND ADVANCED MECHANICAL PROPERTIES |
PCT/US2008/009137 WO2009023090A2 (en) | 2007-08-10 | 2008-07-29 | Corrosion resistant nickel alloy compositions with enhanced castability and mechanical properties |
EP08794827A EP2179068B1 (en) | 2007-08-10 | 2008-07-29 | Corrosion resistant nickel alloy compositions with enhanced castability and mechanical properties |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US95509207P | 2007-08-10 | 2007-08-10 | |
US12/173,983 US20090041615A1 (en) | 2007-08-10 | 2008-07-16 | Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090041615A1 true US20090041615A1 (en) | 2009-02-12 |
Family
ID=40346733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/173,983 Abandoned US20090041615A1 (en) | 2007-08-10 | 2008-07-16 | Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090041615A1 (en) |
EP (1) | EP2179068B1 (en) |
AT (1) | ATE556154T1 (en) |
WO (1) | WO2009023090A2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2434100A1 (en) * | 2010-09-24 | 2012-03-28 | United Technologies Corporation | Turbine engine apparatus with protective coating |
CN103943297A (en) * | 2014-04-29 | 2014-07-23 | 王杨 | Method for preparing cobalt and nickel base soft magnetic material |
RU2530932C1 (en) * | 2013-10-29 | 2014-10-20 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Nickel-based cast heat resistant alloy and product made from it |
US20150197833A1 (en) * | 2012-08-09 | 2015-07-16 | National Institute For Materials Science | Ni-BASED SINGLE CRYSTAL SUPERALLOY |
US9404388B2 (en) | 2014-02-28 | 2016-08-02 | General Electric Company | Article and method for forming an article |
RU2610577C1 (en) * | 2015-12-02 | 2017-02-13 | Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) | CASTING ALLOY BASED ON INTERMETALLIC COMPOUND Ni3Al, AND ARTICLE OUT OF IT |
CN108728694A (en) * | 2017-04-20 | 2018-11-02 | 肯纳金属公司 | Layered component for superalloy articles reparation |
CN112877781A (en) * | 2021-01-13 | 2021-06-01 | 中国航发北京航空材料研究院 | Nickel-based single crystal alloy, method for producing same, use thereof and heat treatment method |
US20230080442A1 (en) * | 2019-12-20 | 2023-03-16 | Vsca As | Metal alloy |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5146576B1 (en) * | 2011-08-09 | 2013-02-20 | 新日鐵住金株式会社 | Ni-base heat-resistant alloy |
CN104476844A (en) * | 2014-12-23 | 2015-04-01 | 常熟市鑫吉利金属制品有限公司 | Anti-oxidation metal product |
GB2539959A (en) | 2015-07-03 | 2017-01-04 | Univ Oxford Innovation Ltd | A Nickel-based alloy |
JP6460336B2 (en) * | 2015-07-09 | 2019-01-30 | 三菱日立パワーシステムズ株式会社 | Ni-based high-strength heat-resistant alloy member, method for producing the same, and gas turbine blade |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE28681E (en) * | 1973-04-02 | 1976-01-13 | High temperature alloys | |
GB2105748A (en) * | 1981-09-14 | 1983-03-30 | United Technologies Corp | Minor element additions to single crystals for improved oxidation resistance |
US4895201A (en) * | 1987-07-07 | 1990-01-23 | United Technologies Corporation | Oxidation resistant superalloys containing low sulfur levels |
US5154884A (en) * | 1981-10-02 | 1992-10-13 | General Electric Company | Single crystal nickel-base superalloy article and method for making |
US5240518A (en) * | 1990-09-05 | 1993-08-31 | General Electric Company | Single crystal, environmentally-resistant gas turbine shroud |
US5346563A (en) * | 1991-11-25 | 1994-09-13 | United Technologies Corporation | Method for removing sulfur from superalloy articles to improve their oxidation resistance |
US5395584A (en) * | 1992-06-17 | 1995-03-07 | Avco Corporation | Nickel-base superalloy compositions |
US20040229072A1 (en) * | 2002-12-16 | 2004-11-18 | Murphy Kenneth S. | Nickel base superalloy |
US20050092398A1 (en) * | 2002-03-27 | 2005-05-05 | National Institute For Materials Science Ishikawajima-Harima Heavy Industries Co. Ltd. | Ni-base directionally solidified superalloy and ni-base single crystal superalloy |
US20050139295A1 (en) * | 2002-08-27 | 2005-06-30 | General Electric Company | Method for selecting a reduced-tantalum superalloy composition of matter and article made therefrom |
US7160400B2 (en) * | 1999-03-03 | 2007-01-09 | Daido Tokushuko Kabushiki Kaisha | Low thermal expansion Ni-base superalloy |
US7169241B2 (en) * | 2003-05-09 | 2007-01-30 | Hitachi, Ltd. | Ni-based superalloy having high oxidation resistance and gas turbine part |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2235697B (en) * | 1986-12-30 | 1991-08-14 | Gen Electric | Improved and property-balanced nickel-base superalloys for producing single crystal articles. |
RU2215804C2 (en) * | 2001-10-08 | 2003-11-10 | Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" | Nickel-base heat-resistant alloy and article made of thereof |
JP4911753B2 (en) * | 2003-12-26 | 2012-04-04 | 川崎重工業株式会社 | Ni-base superalloy and gas turbine component using the same |
-
2008
- 2008-07-16 US US12/173,983 patent/US20090041615A1/en not_active Abandoned
- 2008-07-29 EP EP08794827A patent/EP2179068B1/en not_active Not-in-force
- 2008-07-29 AT AT08794827T patent/ATE556154T1/en active
- 2008-07-29 WO PCT/US2008/009137 patent/WO2009023090A2/en active Application Filing
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE28681E (en) * | 1973-04-02 | 1976-01-13 | High temperature alloys | |
GB2105748A (en) * | 1981-09-14 | 1983-03-30 | United Technologies Corp | Minor element additions to single crystals for improved oxidation resistance |
US5154884A (en) * | 1981-10-02 | 1992-10-13 | General Electric Company | Single crystal nickel-base superalloy article and method for making |
US4895201A (en) * | 1987-07-07 | 1990-01-23 | United Technologies Corporation | Oxidation resistant superalloys containing low sulfur levels |
US5240518A (en) * | 1990-09-05 | 1993-08-31 | General Electric Company | Single crystal, environmentally-resistant gas turbine shroud |
US5346563A (en) * | 1991-11-25 | 1994-09-13 | United Technologies Corporation | Method for removing sulfur from superalloy articles to improve their oxidation resistance |
US5395584A (en) * | 1992-06-17 | 1995-03-07 | Avco Corporation | Nickel-base superalloy compositions |
US7160400B2 (en) * | 1999-03-03 | 2007-01-09 | Daido Tokushuko Kabushiki Kaisha | Low thermal expansion Ni-base superalloy |
US20050092398A1 (en) * | 2002-03-27 | 2005-05-05 | National Institute For Materials Science Ishikawajima-Harima Heavy Industries Co. Ltd. | Ni-base directionally solidified superalloy and ni-base single crystal superalloy |
US7473326B2 (en) * | 2002-03-27 | 2009-01-06 | National Institute For Materials Science | Ni-base directionally solidified superalloy and Ni-base single crystal superalloy |
US20050139295A1 (en) * | 2002-08-27 | 2005-06-30 | General Electric Company | Method for selecting a reduced-tantalum superalloy composition of matter and article made therefrom |
US20040229072A1 (en) * | 2002-12-16 | 2004-11-18 | Murphy Kenneth S. | Nickel base superalloy |
US7169241B2 (en) * | 2003-05-09 | 2007-01-30 | Hitachi, Ltd. | Ni-based superalloy having high oxidation resistance and gas turbine part |
US20070163682A1 (en) * | 2003-05-09 | 2007-07-19 | Hitachi, Ltd. | Ni-based superalloy having high oxidation resistance and gas turbine part |
Non-Patent Citations (1)
Title |
---|
ASM International, Materials Park, Ohio, Properties and Selection: Nonferrous Alloys and Special Purpose Materials: "Rare Earth Metals", October 1990, Volume 2, pp. 720-732. * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2434100A1 (en) * | 2010-09-24 | 2012-03-28 | United Technologies Corporation | Turbine engine apparatus with protective coating |
US8708659B2 (en) | 2010-09-24 | 2014-04-29 | United Technologies Corporation | Turbine engine component having protective coating |
US20150197833A1 (en) * | 2012-08-09 | 2015-07-16 | National Institute For Materials Science | Ni-BASED SINGLE CRYSTAL SUPERALLOY |
US9816161B2 (en) * | 2012-08-09 | 2017-11-14 | Mitsubishi Hitachi Power Systems, Ltd. | Ni-based single crystal superalloy |
RU2530932C1 (en) * | 2013-10-29 | 2014-10-20 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Nickel-based cast heat resistant alloy and product made from it |
US9404388B2 (en) | 2014-02-28 | 2016-08-02 | General Electric Company | Article and method for forming an article |
CN103943297A (en) * | 2014-04-29 | 2014-07-23 | 王杨 | Method for preparing cobalt and nickel base soft magnetic material |
RU2610577C1 (en) * | 2015-12-02 | 2017-02-13 | Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) | CASTING ALLOY BASED ON INTERMETALLIC COMPOUND Ni3Al, AND ARTICLE OUT OF IT |
CN108728694A (en) * | 2017-04-20 | 2018-11-02 | 肯纳金属公司 | Layered component for superalloy articles reparation |
US20230080442A1 (en) * | 2019-12-20 | 2023-03-16 | Vsca As | Metal alloy |
CN112877781A (en) * | 2021-01-13 | 2021-06-01 | 中国航发北京航空材料研究院 | Nickel-based single crystal alloy, method for producing same, use thereof and heat treatment method |
Also Published As
Publication number | Publication date |
---|---|
EP2179068A2 (en) | 2010-04-28 |
WO2009023090A3 (en) | 2009-07-16 |
WO2009023090A2 (en) | 2009-02-19 |
EP2179068B1 (en) | 2012-05-02 |
ATE556154T1 (en) | 2012-05-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20090041615A1 (en) | Corrosion Resistant Alloy Compositions with Enhanced Castability and Mechanical Properties | |
US7169241B2 (en) | Ni-based superalloy having high oxidation resistance and gas turbine part | |
JP5177559B2 (en) | Ni-based single crystal superalloy | |
US20070202003A1 (en) | Rare earth modified high strength oxidation resistant superalloy with enhanced coating compatibility | |
US20070235110A1 (en) | Nickel based superalloys with excellent mechanical strength, corrosion resistance and oxidation resistance | |
US20110262299A1 (en) | Ni-BASED SINGLE CRYSTAL SUPERALLOY AND COMPONENT USING THE SAME AS SUBSTRATE | |
JP3814662B2 (en) | Ni-based single crystal superalloy | |
US20050271886A1 (en) | Oxidation resistant superalloy and article | |
US20120279351A1 (en) | Heat-resistant superalloy | |
US20110142714A1 (en) | Ni-BASED SINGLE CRYSTAL SUPERALLOY AND COMPONENT OBTAINED FROM THE SAME | |
US6491769B1 (en) | Ni-Co-Cr high temperature strength and corrosion resistant alloy | |
US20070199628A1 (en) | Nickel-Base Superalloy | |
EP2420584B1 (en) | Nickel-based single crystal superalloy and turbine blade incorporating this superalloy | |
JP2004197131A (en) | Nickel-base heat resistant alloy and gas turbine blade | |
WO2011019018A1 (en) | Ni-BASED MONOCRYSTALLINE SUPERALLOY AND TURBINE BLADE | |
US9051844B2 (en) | Heat resistant super alloy and its use | |
US9447486B2 (en) | Ni-based alloy for casting used for steam turbine and casting component of steam turbine | |
US20080240926A1 (en) | Cobalt-Free Ni-Base Superalloy | |
JP2005097650A (en) | Ni-BASED SUPERALLOY | |
JP5597598B2 (en) | Ni-base superalloy and gas turbine using it | |
US8048368B2 (en) | High temperature and oxidation resistant material | |
US9103003B2 (en) | Nickel-based superalloy and gas turbine blade using the same | |
US20100329921A1 (en) | Nickel base superalloy compositions and superalloy articles | |
US20080260572A1 (en) | Corrosion and oxidation resistant directionally solidified superalloy | |
US20080253923A1 (en) | Superalloy forming highly adherent chromia surface layer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SIEMENS POWER GENERATION, INC., FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JAMES, ALLISTER W.;FUCHS, GERHARD E.;ARRELL, DOUGLAS J.;REEL/FRAME:021244/0308;SIGNING DATES FROM 20080404 TO 20080528 |
|
AS | Assignment |
Owner name: SIEMENS ENERGY, INC., FLORIDA Free format text: CHANGE OF NAME;ASSIGNOR:SIEMENS POWER GENERATION, INC.;REEL/FRAME:022488/0630 Effective date: 20081001 Owner name: SIEMENS ENERGY, INC.,FLORIDA Free format text: CHANGE OF NAME;ASSIGNOR:SIEMENS POWER GENERATION, INC.;REEL/FRAME:022488/0630 Effective date: 20081001 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |