US4110130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging powdered dispersion strengthened metal
Assignee: SCM Metal Products Inc
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Filing: 1976-09-29
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Granted: 1978-08-29
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Expires: 1996-09-29
Abstract
Abstract Welding electrodes and welding wheels can be hot forged from powdered dispersion strengthened metal wherein the powder is pressed into a preform, heated, and then hot forged to form a full density workpiece to produce a desirable grain structure.
Inventors
- 👤 Anil V. Nadkarni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B23; B23K; B23K35/00; B23K35/40; B23K35/402; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A two-step process for producing a dispersion strengthened metal product having substantially an isotropic grain structure and produced from dispersion strengthened metal powder having an average particle size less than about 300 microns, the process comprising: cold forming from said metal powder a preform having a density of between 80% to 90% of the theoretical full density of said product; coating the preform with graphite lubricant and hot forging said preform at temperatures above about 1400° F. to form substantially a full density product having a density of at least 98% of the theoretical density, said product having substantially an isotropic grain structure.
Claim 2
Dependent Claim
103 words
A two-step process for producing a dispersion strengthened metal product having substantially an isotropic grain structure and produced from dispersion strengthened metal powder having an average particle size less than about 300 microns, the process comprising: cold forming from said metal powder a preform having a density of between 80% to 90% of the theoretical full density of said product; coating the preform with graphite lubricant and hot forging said preform at temperatures above about 1400° F. to form substantially a full density product having a density of at least 98% of the theoretical density, said product having substantially an isotropic grain structure.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |