US4169744A
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US
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Nickel-chromium-silicon alloy brazing foil
Assignee: Western Gold and Platinum Co
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Filing: 1978-06-28
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Granted: 1979-10-02
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Expires: 1998-06-28
Abstract
Abstract Nickel-Chromium-Silicon alloys of the nominal composition, Ni.sub.(45-78) Cr.sub.(16-34) Si.sub.(6-21) in the form of thin foil are made ductile by the presence of appreciable amounts of an amorphous phase and a metastable, solid solution, microcrystalline single phase and are especially suitable for preplacement as preforms in a joining operation such as brazing. Up to abour 40 atomic percent of the nickel is replaceable with palladium.
Inventors
- 👤 Thomas L. D'Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:44
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304; B23K35/02; B23K35/0222; B23K35/0233
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A thin ductile brazing sheet consisting essentially of an alloy consisting essentially of from about 45 to about 78 atomic percent of nickel, from about 16 to about 34 atomic percent of chromium and from about 6 to about 21 atomic percent of silicon, said sheet having a thickness of from about 0.0005 to about 0.005 inches and said composition containing a sufficient amount of an amorphous phase and a metastable, solid solution, microcrystalline phase to render said alloy ductile.
Claim 2
Dependent Claim
80 words
A thin ductile brazing sheet consisting essentially of an alloy consisting essentially of from about 45 to about 78 atomic percent of nickel, from about 16 to about 34 atomic percent of chromium and from about 6 to about 21 atomic percent of silicon, said sheet having a thickness of from about 0.0005 to about 0.005 inches and said composition containing a sufficient amount of an amorphous phase and a metastable, solid solution, microcrystalline phase to render said alloy ductile.
Claim 3
Dependent Claim
18 words
A sheet according to claim 1 wherein said amorphous phase is present in at least about 10 percent.
Claim 4
Dependent Claim
19 words
A sheet according to claim 1 wherein up to 40 atomic percent of the nickel is replaced by palladium.
Claim 5
Dependent Claim
33 words
A sheet according to claim 1 wherein said composition consists essentially of from about 17 to about 20 atomic percent of chromium and from about 18 to about 20 atomic percent of silicon.
Claim 6
Dependent Claim
22 words
A brazing sheet according to claim 4 wherein said composition has the formula, Ni 62 .3 Cr 18 .9 Si 18 .8.
References Cited (Backward Citations)
US3856513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |