US4349145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for brazing a surface of an age hardened chrome copper member
Assignee: Chase Brass and Copper Co Inc
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Filing: 1980-12-03
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Granted: 1982-09-14
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Expires: 2000-12-03
Abstract
Abstract A method for brazing a surface of an age hardened chrome copper member to a surface of a stainless steel member is disclosed. The process includes plating surfaces with copper, applying a brazed material of a copper/gold alloy between said surfaces, applying a brazing paste between said surfaces and rapidly heating the materials to fuse them together in a protected atmosphere. A particular disclosed embodiment of the method comprises the brazing of the cooler body assembly of a continuous casting die for casting copper strands.
Inventors
- 👤 George Shinopulos
- 👤 M. Ronald Randlett
- 👤 Terry F. Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:08
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/19; B22; B22D; B22D11/00; B22D11/04; B22D11/055; B22D11/14; B22D11/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A method for brazing a surface of an age hardened chrome copper member to a surface of a stainless steel member comprising the steps of plating said surfaces with copper, applying a braze material of a copper/gold alloy between said surfaces, applying a brazing paste of said copper/gold alloy between said surfaces, urging said surfaces toward one another, said brazing material and said braze paste, heating said alloys to a temperature below the fusing point of said braze material in a protected atmosphere, rapidly heating said materials to fuse said braze material in a protected atmosphere, and cooling said materials in a protected atmosphere after said rapid heating.
Claim 2
Independent Claim
108 words
A method for brazing a surface of an age hardened chrome copper member to a surface of a stainless steel member comprising the steps of plating said surfaces with copper, applying a braze material of a copper/gold alloy between said surfaces, applying a brazing paste of said copper/gold alloy between said surfaces, urging said surfaces toward one another, said brazing material and said braze paste, heating said alloys to a temperature below the fusing point of said braze material in a protected atmosphere, rapidly heating said materials to fuse said braze material in a protected atmosphere, and cooling said materials in a protected atmosphere after said rapid heating.
Claim 3
Dependent Claim
21 words
The brazing method of claim 1 wherein said brazing material and brazing paste material is approximately 60% cooper and 40% gold.
Claim 4
Dependent Claim
18 words
The brazing method of claim 1 wherein said heating below the fusing point is for approximately ten minutes.
Claim 5
Dependent Claim
25 words
A brazing method according to claim 1 wherein said plating produces a copper layer having a thickness in the range of 0.001 to 0.002 inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |