US4480016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous, ductile brazing foils
Assignee: Honeywell International Inc
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Filing: 1982-09-27
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Granted: 1984-10-30
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Expires: 2002-09-27
Abstract
Abstract Metal parts are brazed by means of an amorphous filler metal foil. The brazing foil, useful for brazing stainless steels, has a composition consisting essentially of about 0-10 atom percent iron, about 0-20 atom percent chromium, about 3-5 atom percent molybdenum, about 5-35 atom percent cobalt, about 14-19 atom percent boron and the balance nickel and incidental impurities. The ductile foil permits fabrication of preforms of complex shapes which do not require binders and/or fluxes necessary for brazing powders presently used to braze stainless steels and nickel base alloys, and exhibits excellent braze-metal and high-temperature strengths.
Inventors
- 👤 Claude Henschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:44
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/04; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12937; Y10T428/12944; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A brazed metal article, said article having metal parts, said metal parts having been brazed with a filler material in the form of a homogeneous, ductile brazing foil composed of metastable material having at least 50 percent glassy structure, said foil having a composition consisting of about 0 to 10 atom percent iron, about 2-5 atom percent molybdenum, about 10 to 30 atom percent cobalt, about 16 to 18 atom percent boron, 5 to 15 atom percent chromium the balance essentially nickel and incidental impurities, wherein the braze material has a capability of a joint tensile strength of 43,680 to 76,000 psi when brazed to grade 316 stainless steel.
Claim 2
Dependent Claim
109 words
A brazed metal article, said article having metal parts, said metal parts having been brazed with a filler material in the form of a homogeneous, ductile brazing foil composed of metastable material having at least 50 percent glassy structure, said foil having a composition consisting of about 0 to 10 atom percent iron, about 2-5 atom percent molybdenum, about 10 to 30 atom percent cobalt, about 16 to 18 atom percent boron, 5 to 15 atom percent chromium the balance essentially nickel and incidental impurities, wherein the braze material has a capability of a joint tensile strength of 43,680 to 76,000 psi when brazed to grade 316 stainless steel.
Claim 3
Dependent Claim
17 words
The brazed metal article of claim 1 wherein said foil is at least about 80 percent glassy.
Claim 4
Dependent Claim
13 words
The brazed metal article of claim 1 wherein said foil is substantially glassy.
Claim 5
Dependent Claim
20 words
The brazed metal article of claim 1 wherein said foil has a thickness ranging from about 0.0015 to 0.005 inch.
References Cited (Backward Citations)
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |