US3628233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the low-temperature joining of carbides
Assignee: Carmet Co
•
Filing: 1969-11-03
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Granted: 1971-12-21
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Expires: 1989-11-03
Abstract
Abstract Described herein is a method of joining metal carbides from the group consisting of tungsten carbide, tantalum carbide and titanium carbide which permits the use of low-silver, alloy solder at brazing temperatures under about 800* F.
Inventors
- 👤 John J Sowko Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B35/00; C04B35/622; C04B35/626; C04B35/62605; C04B35/6269; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/40; C04B2237/405; C04B2237/406
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A method of joining metal carbide from the group consisting of tungsten carbide, tantalum carbide and titanium carbide at temperatures less than about 800* F. which comprises heating said carbide to a temperature of 1,950* to 2,200* F. and cooling in a nonoxidizing atmosphere; brazing said carbide to a metal component by melting a low-silver, alloy solder containing less than 10 percent silver at a temperature less than about 800* F. and thereafter cooling to effect a bonded joint.
Claim 2
Independent Claim
79 words
A method of joining metal carbide from the group consisting of tungsten carbide, tantalum carbide and titanium carbide at temperatures less than about 800* F. which comprises heating said carbide to a temperature of 1,950* to 2,200* F. and cooling in a nonoxidizing atmosphere; brazing said carbide to a metal component by melting a low-silver, alloy solder containing less than 10 percent silver at a temperature less than about 800* F. and thereafter cooling to effect a bonded joint.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said silver, alloy solder contains less than 5 percent silver.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein said silver alloy contains about 1 1/2 percent silver.
Claim 5
Dependent Claim
16 words
A method according to claim 1 wherein said joining temperature is less than about 500* F.
References Cited (Backward Citations)
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Cited
US3001269A
Cited
US3034205A
Cited
US3110571A
Cited
US3058210A
Cited
US3372464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |