US3793091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superplastic conditioning of ternary and quaternary zinc-aluminum alloys
Assignee: Noranda Inc
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Filing: 1971-12-07
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Granted: 1974-02-19
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Expires: 1991-12-07
Abstract
Abstract Ternary and quaternary zinc-aluminum alloys are conditioned to exhibit superplastic behaviour by hot-working thereof at temperatures between about 205*C and the eutectoid temperature of the alloy. This conditioning may be preceded by homogenization and quenching of the alloy and followed by drawing of the alloy.
Inventors
- 👤 E Gervais
- 👤 P Chollet
- 👤 R Ranger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:04
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C22F1/165; C22C; C22C18/00; C22C18/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
15 words
A method in accordance with claim 1 wherein said hot working is by hot extrusion.
Claim 2
Dependent Claim
15 words
A method in accordance with claim 1 wherein said hot working is by hot rolling.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 2 wherein said alloys are drawn after hot extrusion.
Claim 4
Dependent Claim
24 words
A method in accordance with claim 1 wherein said alloys are selected from near eutectoid ternary Zn-Al-Cu and Zn-Al-Mg alloys and quaternary Zn-Al-Cu-Mg alloys.
Claim 5
Dependent Claim
25 words
A method in accordance with claim 1 wherein said alloys are hot worked by hot rolling up to a reduction in thickness of 80-95 percent.
Claim 6
Dependent Claim
19 words
A method in accordance with claim 1 wherein said alloys are hot worked at a temperAture of about 250*C.
Claim 7
Dependent Claim
23 words
A method in accordance with claim 1 wherein said ternary and quaternary zinc-aluminum alloys contain magnesium in an amount less than 0.05 percent.
Claim 8
Independent Claim
52 words
A method of conditioning ternary and quaternary zinc-aluminum alloys which are conditionable to exhibit superplastic behavior which comprises, without any associated or immediate prior heat treatment, subjecting said alloys to hot working at a temperature between about 205*C. and the eutectoid temperature of the alloy to impart to said alloys superplastic behavior.
Claim 9
Dependent Claim
24 words
A method in accordance with claim 9 wherein said alloys are selected from near eutectoid ternary Zn-Al-Cu and Zn-Al-Mg alloys and quaternary Zn-Al-Cu-Mg alloys.
Claim 10
Dependent Claim
25 words
A method in accordance with claim 9 wherein said alloys are hot worked by hot rolling up to a reduction in thickness of 80-95 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |