US3632319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion bonding of superalloy members
Assignee: General Electric Co
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Filing: 1969-07-11
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Granted: 1972-01-04
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Expires: 1989-07-11
Abstract
Abstract An improved diffusion-bonded, age hardenable joint between superalloy members results from a method which combines the benefits of vacuum high-temperature brazing and pressure solidstate diffusion bonding through use of an age hardenable bonding powder related to the superalloy and including temperature depressants selected from B, Si, Mn, Cb, Ta and their mixtures. The method avoids the need for pressure during the diffusion bonding portion.
Inventors
- 👤 George S Hoppin
- 👤 Reed E Yount
- 👤 Thomas F Berry
- 👤 James F Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:38
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304; B23K35/001; B23K35/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
In a method as described in claim 1 in which, after homogenization, the joint portion is heated at a third temperature less than the first temperature for a time sufficient to age harden the joint portion.
Claim 2
Dependent Claim
130 words
In a method as described in claim 1 for bonding a plurality of age hardenable superalloy members, the superalloy based on an element selected from the group consisting of Fe, Co, and Ni, in which: the age hardenable bonding material consists essentially of, by weight, up to about 0.3% C, up to about 25% Cr, up to about 17% of elements selected from the group consisting of Mo and W, 0.3-7% A1, 0.5-6% Ti, up to about 2% V, up to about 0.2% Zr, greater than 1 up to about 15 weight percent of the total composition of elements selected from the group consisting of B, Si, Mn, Cb, Ta, and their mixtures, with the balance except for incidental impurities selected from the group consisting of Fe, Co, and Ni.
Claim 3
Dependent Claim
152 words
In a method as described in claim 3 for bonding superalloy members based on nickel in which: the high vacuum is no more than about 10 3 mm. Hg pressure; the joint gap is in the range of 0.001-0.005 inch; the bonding material consists essentially of an age hardenable powder consisting essentially of, by weight, 0.02-0.3% C; 8-25% Cr; 5-20% Co; 2-12% Mo; 0.3-7% A1; 0.5-6% Ti; up to about 5%W; up to about 2% V; up to about 0.2% Zr; up to about 25% Fe; with the balance nickel and incidental impurities and greater than 1 percent up to about 15 percent of elements selected from the group consisting of B, Si, Mn, Cb, Ta, and their mixtures; the powder having a liquidus temperature below about 2,250* F.; the first temperature is in the range of about 1,950*-2,250* F.; and the second temperature is in the range of about 1,600*-2,100* F.
Claim 4
Dependent Claim
43 words
In a method as described in claim 4 in which, after homogenization, the joint portion is heated at a third temperature less than the first temperature and in the range of about 1,300*-2,000* F. for a time sufficient to age the joint portion.
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |