US4808225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an alloy product of improved ductility from metal powder
Assignee: Special Metals Corp
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Filing: 1988-01-21
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Granted: 1989-02-28
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Expires: 2008-01-21
Abstract
Abstract A process for producing an alloy product of improved ductility from metal powder. It includes the steps of: providing metal powder having at least 5 wt. % of one or more reactive elements from the group consisting of titanium, aluminum, hafnium, niobium, tantalum, vanadium and zirconium; consolidating the powder to an essentially fully dense shape; and progressively melting and solidifying localized areas of the consolidated shape so as to produce a product of improved ductility.
Inventors
- 👤 Stephen J. Donachie
- 👤 James W. Fesko
- 👤 James J. Furgal
- 👤 Francis E. Sczerzenie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:06
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; B; B22; B22F; B22F1/00; C22C; C22C1/00; C22C1/04; C22C1/0433; Y; Y10; Y10S; Y10S75/00; Y10S75/95
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
In a process for producing an alloy product of improved ductility from metal powder, which process includes the steps of: providing atomized metal powder having at least 5 wt. % of one or more reactive elements from the group consisting of titanium, aluminum, hafnium, niobium, tantalum, vanadium and zirconium; and consolidating said powder to an essentially fully dense shape fundamentally free of interconnected porosity; the improvement comprising the step of progressively melting and solidifying localized areas of said consolidated shape so as to produce a product of improved ductility.
Claim 2
Dependent Claim
89 words
In a process for producing an alloy product of improved ductility from metal powder, which process includes the steps of: providing atomized metal powder having at least 5 wt. % of one or more reactive elements from the group consisting of titanium, aluminum, hafnium, niobium, tantalum, vanadium and zirconium; and consolidating said powder to an essentially fully dense shape fundamentally free of interconnected porosity; the improvement comprising the step of progressively melting and solidifying localized areas of said consolidated shape so as to produce a product of improved ductility.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein said metal powder has at least 5 wt. % titanium.
Claim 4
Dependent Claim
28 words
A process according to claim 2, wherein said metal powder is a prealloyed powder containing at least 45 wt. % nickel and at least 30 wt. % titanium.
Claim 5
Dependent Claim
24 words
A process according to claim 3, wherein said metal powder is essentially a nickel-titanium binary alloy containing from 53 to 62 wt. % nickel.
Claim 6
Dependent Claim
24 words
A process according to claim 4, including the steps of: providing at least two prealloyed powders of dissimilar transition temperature; and blending said powders.
Claim 7
Dependent Claim
17 words
A process according to claim 1, wherein the consolidated powder is arc melted in a protective atmosphere.
Claim 8
Dependent Claim
13 words
A process according to claim 1, wherein said powder is hot isostatically pressed.
Claim 9
Dependent Claim
18 words
A process according to claim 1, including the steps of hot rolling and drawing said product to wire.
Claim 10
Dependent Claim
15 words
A nickel-titanium alloy of improved ductility, made in accordance with the process of claim 1.
References Cited (Backward Citations)
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US3704508A
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US3907550A
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US4310354A
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US4394183A
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US4665970A
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US4719077A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |