US2169441A - Working zinc alloys - Google Patents
Working zinc alloys Download PDFInfo
- Publication number
- US2169441A US2169441A US165322A US16532237A US2169441A US 2169441 A US2169441 A US 2169441A US 165322 A US165322 A US 165322A US 16532237 A US16532237 A US 16532237A US 2169441 A US2169441 A US 2169441A
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- US
- United States
- Prior art keywords
- zinc
- alloy
- aluminum
- alloys
- working
- 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.)
- Expired - Lifetime
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/70—Deforming specified alloys or uncommon metal or bimetallic work
Definitions
- This invention relates to improvements in forming alloy metal objects and particularly to working zinc alloys containing from 10 to 20% aluminum to produce'an alloy object without im- 6 pairing the mechanical properties of the alloys.
- Zinc generally is rolled at temperatures below 200 C. because its rollability is decreased at higher temperatures. The presence of other substances in the zinc generally decreases the rollability so that the rolling temperature must be increased in the case of zinc alloys. However, in practice, temperatures of 270 C. are not exceeded because this tends to bring about deterioration in the mechanical properties of the rolled alloys. Moreover, the temperature cannot be decreased below 180 C. on account of the high roll pressures then requisite. (A. Burkhardt, Technologie der Zinklegleiteren, Berlin 1937, page 192.)
- Our invention contemplates the improvement in the manufacture of zinc base objects which comprises working at a temperature ranging from 270 C. to 380 C., and preferably at 340 C. a zinc-base alloy containing from 10 55 to 20% aluminum, and more particularly an alloy consisting of 10 to 15% aluminum, 1.5 to 4% copper, .01 to .04 magnesium, the balance of the alloy being zinc having a purity of at least 99.98%.
- a zinc-base alloy containing from 10 55 to 20% aluminum, and more particularly an alloy consisting of 10 to 15% aluminum, 1.5 to 4% copper, .01 to .04 magnesium, the balance of the alloy being zinc having a purity of at least 99.98%.
- the curves A and B in the accompanying single figure illustrate the sudden increase in malleability of aluminum-bearing zinc base alloys that we have discovered.
- Two alloys A and B were subjected under constant load to difierent temperatures.
- the ordinates show the change of form suffered by the test rods under a compression of 7.5 kilograms per square millimeter. The change in form was measured in per cent decrease in the height of the pieces under compression.
- the abscissae in the figure show the temperature of deformation in degrees Centigrade.
- the compositions of the alloys investigated were as follows:
- the improvement which comprises working at a temperature ranging from 270 to 380 C. an aluminum-bearing zinc base alloy containing from 10 to 20% aluminum.
- the improvement which comprises working at a temperature of about 340 C. an aluminum-bear ing zinc base alloy containing from 10' to 20% aluminum.
- the.improvement which comprises working .at a temperature ranging from 270 to 380 C. an alloyconsisting of 10 to 15% aluminum, 1.5 to 4% copper and 0.01 to 0.04% magnesium, the balance of the alloy being zinc having-a purity of at least 99.98%.
Description
, Patented Aug. 15, 1939 UNITED STATES PATENT OFFICE WORKING ZINC ALLOYS Application September 23, 1937, Serial No. 165,322 In Germany June 2, 1937 4 Claims.
This invention relates to improvements in forming alloy metal objects and particularly to working zinc alloys containing from 10 to 20% aluminum to produce'an alloy object without im- 6 pairing the mechanical properties of the alloys.
Zinc generally is rolled at temperatures below 200 C. because its rollability is decreased at higher temperatures. The presence of other substances in the zinc generally decreases the rollability so that the rolling temperature must be increased in the case of zinc alloys. However, in practice, temperatures of 270 C. are not exceeded because this tends to bring about deterioration in the mechanical properties of the rolled alloys. Moreover, the temperature cannot be decreased below 180 C. on account of the high roll pressures then requisite. (A. Burkhardt, Technologie der Zinklegierungen, Berlin 1937, page 192.)
We have found, however, that aluminum-bearing zinc base alloys containing from 10 to 20% of aluminum can readily be rolled and otherwise worked at temperatures between 270 and 380 C.. and preferably at a temperature of about 340 C. Although the addition of aluminum generally decreases the rollability of zinc so far that at 25 medium temperatures only slight decreases in thickness are possible at each pass, it was unexpeetedly found that at temperatures about 270 C. the malleability of zinc-base alloys containing 10 to 20% of aluminum increased so suddenly and the work of deformation decreased so rapidly that in this range hot working is possible with heavy reductions at each pass. The mechanical properties of the resuting zinc alloy objects are not impaired by this method of treatment, but 3 instead are generally improved. Thus we have discovered that the malleability of an alloy consisting of 10 to 15% aluminum, 1.5 to 4% copper and .01 to .04% magnesium, the balance of the alloy being zinc having a purity of at least 99.98% (as described in co-pending United States application No. 159,711, filed August 18th, 1937, by Herbert Winter, and subsequently issued as United States Patent No. 2,102,869, on December 21, 1937) increases suddenly at temperatures above 270 C. and retains this increased mallea- -bility to. a temperature of about 380 C. At a temperature of 340 C. the malleability of this alloy is optimum.
Our invention, therefore, contemplates the improvement in the manufacture of zinc base objects which comprises working at a temperature ranging from 270 C. to 380 C., and preferably at 340 C. a zinc-base alloy containing from 10 55 to 20% aluminum, and more particularly an alloy consisting of 10 to 15% aluminum, 1.5 to 4% copper, .01 to .04 magnesium, the balance of the alloy being zinc having a purity of at least 99.98%. When such alloys are thus worked, there is no deterioration in their mechanical properties. On the contrary, the resulting metal objects possess high tensile and impact strengths, 6 improved machinability and high resistance to corrosion.
The curves A and B in the accompanying single figure illustrate the sudden increase in malleability of aluminum-bearing zinc base alloys that we have discovered. Two alloys A and B were subjected under constant load to difierent temperatures. In the figure the ordinates show the change of form suffered by the test rods under a compression of 7.5 kilograms per square millimeter. The change in form was measured in per cent decrease in the height of the pieces under compression. The abscissae in the figure show the temperature of deformation in degrees Centigrade. The compositions of the alloys investigated were as follows:
We claim:
1. In the manufacture of zinc alloy objects, the improvement which comprises working at a temperature ranging from 270 to 380 C. an aluminum-bearing zinc base alloy containing from 10 to 20% aluminum.
2. In the manufacture of zinc alloy objects, the improvement which comprises working at a temperature of about 340 C. an aluminum-bear ing zinc base alloy containing from 10' to 20% aluminum.
3. In the manufacture of zinc alloy objects, the.improvement which comprises working .at a temperature ranging from 270 to 380 C. an alloyconsisting of 10 to 15% aluminum, 1.5 to 4% copper and 0.01 to 0.04% magnesium, the balance of the alloy being zinc having-a purity of at least 99.98%.
4. In the manufacture of a zinc alloy object, the improvement which comprises working at a temperature of about 340 C. an alloy consisting of 10 to 15% aluminumflfi to 4% copper, and 0.01 to 0.04 magnesium, the balance of the alloy being zinc having a purity of at least 99.98%.
HERBERT WINTER. WOLFGANG FAHRENHORBT.
ERICH SCHIJID.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2169441X | 1937-06-02 |
Publications (1)
Publication Number | Publication Date |
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US2169441A true US2169441A (en) | 1939-08-15 |
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ID=7988338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US165322A Expired - Lifetime US2169441A (en) | 1937-06-02 | 1937-09-23 | Working zinc alloys |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2516737A (en) * | 1944-01-15 | 1950-07-25 | New Jersey Zinc Co | Hot-rolled binary zinc-titanium alloy |
US3753791A (en) * | 1970-01-01 | 1973-08-21 | Imp Smelting Corp Ltd | Heat-treatment of zinc/aluminium alloys |
US3966505A (en) * | 1974-05-15 | 1976-06-29 | Ball Corporation | High strength wrought zinc alloy |
US3972743A (en) * | 1975-10-20 | 1976-08-03 | Ball Corporation | High strength, stable zinc-aluminum alloy |
US4599279A (en) * | 1984-10-01 | 1986-07-08 | Ball Corporation | Zinc alloy for reducing copper-zinc diffusion |
US6383657B1 (en) | 2000-12-18 | 2002-05-07 | Alltrista Zinc Products | Aluminum clad zinc bimetallic coin planchet |
US20040173294A1 (en) * | 1998-11-17 | 2004-09-09 | Grillo-Werke Ag | Use of zinc alloys |
-
1937
- 1937-09-23 US US165322A patent/US2169441A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2516737A (en) * | 1944-01-15 | 1950-07-25 | New Jersey Zinc Co | Hot-rolled binary zinc-titanium alloy |
US3753791A (en) * | 1970-01-01 | 1973-08-21 | Imp Smelting Corp Ltd | Heat-treatment of zinc/aluminium alloys |
US3966505A (en) * | 1974-05-15 | 1976-06-29 | Ball Corporation | High strength wrought zinc alloy |
US3972743A (en) * | 1975-10-20 | 1976-08-03 | Ball Corporation | High strength, stable zinc-aluminum alloy |
US4599279A (en) * | 1984-10-01 | 1986-07-08 | Ball Corporation | Zinc alloy for reducing copper-zinc diffusion |
US20040173294A1 (en) * | 1998-11-17 | 2004-09-09 | Grillo-Werke Ag | Use of zinc alloys |
US6383657B1 (en) | 2000-12-18 | 2002-05-07 | Alltrista Zinc Products | Aluminum clad zinc bimetallic coin planchet |
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