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US3680197A
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Diffusion bonding method
Assignee: RTX Corp
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Filing: 1969-11-05
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Granted: 1972-08-01
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Expires: 1989-11-05
Abstract
Abstract A diffusion bonding method for the alloys exhibiting a defined recrystallization temperature, or eutectoid or peritectoid behavior as part of their phase equilibrium characteristics, which involves repetitively cycling the alloy to be joined between a temperature slightly above and below the recrystallization temperature, or allotropic transformation temperature, and controlling the rate of new grain nucleation and growth across the joint interface.
Inventors
- 👤 Bernard Saul Blum
- 👤 Marvin Lee Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50; B; B23; B23K; B23K20/00; B23K35/00; B23K35/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
The method according to claim 1 wherein; the closure pressure does not exceed that providing a tolerable deformation at the bonding temperature.
Claim 2
Dependent Claim
25 words
The method according to claim 1 wherein; subsequent to the bonding step, the bonded alloys at the interface are normalized or homogenized by heat treatment.
References Cited (Backward Citations)
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US3025592A
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US3145466A
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US3486219A
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |