US3762916A
Expired / Lapsed
US
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Aluminum base alloys
Assignee: Olin Corp
•
Filing: 1972-07-10
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Granted: 1973-10-02
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Expires: 1992-07-10
Abstract
Abstract Wrought aluminum base alloys having high strength and improved toughness. The alloys consist essentially of zinc from 4 to 9 percent, magnesium from 1 to 4 percent, zirconium from 0.05 to 0.40 percent, copper from 0.5 to 3.5 percent, boron from 0.01 to 0.05 percent and the balance essentially aluminum.
Inventors
- 👤 I Kirman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
13 words
An alloy according to claim 1 wherein said alloy is substantially chromium free.
Claim 2
Dependent Claim
66 words
A wrought aluminum base alloy having improved toughness and high strength consisting essentially of zinc from 4 to 9 percent, magnesium from 1 to 4 percent, copper from 0.5 to 3.5 percent, zirconium from 0.05 to 0.40 percent, boron from 0.01 to 0.05 percent and the balance essentially aluminum, said alloy being in the heat treated and aged condition and having high strength and improved toughness.
Claim 3
Dependent Claim
19 words
An alloy according to claim 3 wherein the zinc is present in an amount from 5 to 6.5 percent.
Claim 4
Dependent Claim
19 words
An alloy according to claim 3 wherein the magnesium is present in an amount from 2 to 3 percent.
Claim 5
Dependent Claim
19 words
An alloy according to claim 3 wherein the zirconium is present in an amount from 0.1 to 0.2 percent.
Claim 6
Dependent Claim
19 words
An alloy according to claim 3 wherein the boron is present in an amount from 0.01 to 0.02 percent.
Claim 7
Dependent Claim
19 words
An alloy according to claim 3 wherein the copper is present in an amount from 1 to 3 percent.
Claim 8
Dependent Claim
29 words
An alloy according to claim 3 containing titanium up to 0.1% max., manganese up to 0.2 percent max., silicon up to 0.4% max., and iron up to 0.5% max.
Claim 9
Dependent Claim
13 words
An alloy according to claim 3 wherein said alloy is substantially chromium free.
Claim 10
Dependent Claim
102 words
A process for providing improved toughness and high strength in a wrought aluminum base alloy consisting essentially of zinc from 4 to 9 percent, magnesium from 1 to 4 percent, zirconium from 0.05 to 0.40 percent, copper from 0.5 to 3.5 percent, boron from 0.01 to 0.05 percent, balance essentially aluminum, which comprises: A. hot rolling said alloy; B. cold rolling said alloy; C. solution heat treating said alloy at a temperature of from 750* to 1,000*F for at least 5 minutes followed by rapid cooling; and D. aging for at least 30 minutes at a temperature of from 200* to 400*F.
Claim 11
Dependent Claim
22 words
A process according to claim 11 wherein said magnesium, zinc and copper components are substantially retained in solution following said rapid cooling.
Claim 12
Dependent Claim
20 words
A process according to claim 11 wherein said alloys are solution heat treated for from 5 minutes to 48 hours.
Claim 13
Dependent Claim
19 words
A process according to claim 13 wherein saId alloys are quenched to substantially room temperature following solution heat treatment.
Claim 14
Dependent Claim
22 words
A process according to claim 14 wherein said magnesium, zinc and copper components are substantially retained in solution following said rapid cooling.
Claim 15
Dependent Claim
18 words
A process according to claim 15 wherein said alloy is aged for from 30 minutes to 48 hours.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |