Patent US3342971A successfully refreshed from Google Patents.
US3342971A
Expired / Lapsed
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Method for brazing super alloys and refractory metals
Assignee: General Dynamics Corp
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Filing: 1966-09-07
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Granted: 1967-09-19
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Expires: 1986-09-07
Abstract
No abstract record available.
Inventors
- 👤 William T Kaarlela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0014; B23K1/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR JOINING REFRACTORY METALS AND SUPER ALLOYS WITHOUT SUBSTANTIALLY DELETERIOUS RECRYSTALLIZATION THEREIN COMPRISING: (A) SELECTING THE MATERIAL TO BE JOINED; (B) POSITIONING SAID MATERIAL IN A CLOSED ENVIRONMENT; AND IN CONTACT WITH A REFRACTORY METAL ELECTRICAL RESISTANCE HEATER MEANS AND APPLYING A BRAZE ALLOY TO THE SURFACES OF SAID MATERIAL TO BE JOINED; (C) HEATING SAID MATERIAL SLOWLY BY CONTROLLED GRADUATED STEPS TO A POINT JUST BELOW THAT AT WHICH RECRYSTALLIZATION BEGINS; (D) CAUSING THE TEMPERATURE OF SAID MATERIAL TO RAPIDLY INCREASE TO THE BRAZING TEMPERATURE OF SAID SELECTED MATERIAL; (E) TERMINATING THE TEMPERATURE PRODUCING FUNCTION AND EFFECTING A RAPID TEMPERATURE DECREASE IN SAID SELECTED MATERIAL TO A POINT BELOW THE RECRYSTALLIZATION ZONE FOR SAID SELECTED MATERIAL SO THAT THE MATERIAL IS ABOVE THE POINT AT WHICH RECRYSTALLIZATION BEGINS FOR NO MORE THAN SIXTY SECONDS.
Claim 2
Dependent Claim
137 words
A PROCESS FOR JOINING REFRACTORY METALS AND SUPER ALLOYS WITHOUT SUBSTANTIALLY DELETERIOUS RECRYSTALLIZATION THEREIN COMPRISING: (A) SELECTING THE MATERIAL TO BE JOINED; (B) POSITIONING SAID MATERIAL IN A CLOSED ENVIRONMENT; AND IN CONTACT WITH A REFRACTORY METAL ELECTRICAL RESISTANCE HEATER MEANS AND APPLYING A BRAZE ALLOY TO THE SURFACES OF SAID MATERIAL TO BE JOINED; (C) HEATING SAID MATERIAL SLOWLY BY CONTROLLED GRADUATED STEPS TO A POINT JUST BELOW THAT AT WHICH RECRYSTALLIZATION BEGINS; (D) CAUSING THE TEMPERATURE OF SAID MATERIAL TO RAPIDLY INCREASE TO THE BRAZING TEMPERATURE OF SAID SELECTED MATERIAL; (E) TERMINATING THE TEMPERATURE PRODUCING FUNCTION AND EFFECTING A RAPID TEMPERATURE DECREASE IN SAID SELECTED MATERIAL TO A POINT BELOW THE RECRYSTALLIZATION ZONE FOR SAID SELECTED MATERIAL SO THAT THE MATERIAL IS ABOVE THE POINT AT WHICH RECRYSTALLIZATION BEGINS FOR NO MORE THAN SIXTY SECONDS.
References Cited (Backward Citations)
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US3067508A
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US3167634A
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |