US3765958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating a formed powder product material
Assignee: AERONAUTICS OF SPACE
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Filing: 1972-06-28
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Granted: 1973-10-16
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Expires: 1992-06-28
Abstract
Abstract Heat treating a product material of prealloyed powders after shaping by superplastic deformation restores the ability of the material to resist deformation at high temperatures. Heat treating is accomplished by heating to a temperature between the solidus and liquidus with the application of isostatic pressure to close any voids. This pressure may be simultaneously applied while the material is at the heat treating temperature. The pressure may also be applied when the material cools to a temperature between that at which it is shaped and the solidus.
Inventors
- 👤 J Freche
- 👤 W Waters
- 👤 R Ashbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:47
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/12; B22F3/1208; B22F3/1258; B22F3/1266; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A method of heat treating as claimed in claim 1 wherein the isostatic pressure is imposed simultaneously with the heating.
Claim 2
Dependent Claim
40 words
A method of heat treating as claimed in claim 1 including the step of cooling the material to a second temperature below the incipient melting point before imposing the isostatic pressure, said isostatic pressure being applied at said second temperature.
Claim 3
Dependent Claim
31 words
A method of heat treating as claimed in claim 4 wherein the material is cooled to a temperature between that at which the material exhibits superplastic behavior and the solidus temperature.
Claim 4
Dependent Claim
20 words
A method of heat treating as claimed in claim 1 wherein the formed powder product material is a nickel-base alloy.
Claim 5
Dependent Claim
20 words
A method of heat treating as claimed in claim 1 wherein the formed powder product material is a cobalt-base alloy.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |