US3948432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing preforms and method of brazing
Assignee: Olin Corp
•
Filing: 1974-09-26
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Granted: 1976-04-06
•
Expires: 1994-09-26
Abstract
Abstract Brazing preforms are disclosed which may take the form of wire, sheet or strip, and which are useful for joining copper, ferrous and nickel base alloys. The preforms of this invention are prepared from an alloy which contains manganese from 22 to 40%, iron from 0.1 to 2%, aluminum from 0.1 to 5%, zinc from 2 to 10%, balance essentially copper. A method of brazing is also disclosed which may be performed with or without a flux, and which is conducted in an inert atmosphere, at a temperature of from about 900 DEG to 1100 DEG C. The brazed products of this invention possess reduced brittleness and improved resistance to corrosion.
Inventors
- 👤 Michael J. Pryor
- 👤 Stanley Shapiro
- 👤 Derek E. Tyler
- 👤 John Shabarack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
113 words
A method of joining metal members by brazing which comprises: A. providing a brazing preform prepared from an alloy consisting of manganese from 22 to 40%, iron from 0.1 to 2%, aluminum from 0.1 to 5%, zinc from 2 to 10%, balance copper; B. bringing said metal members into joining relationship at at least one joining site and disposing said preform thereat to form a brazing assembly; C. heating said assembly to brazing temperature; D. holding the assembly at said brazing temperature for a period of time sufficient to allow said preform to melt and thereby wet and join said metal members in a brazed joint; and E. allowing said joint to solidify.
Claim 2
Independent Claim
113 words
A method of joining metal members by brazing which comprises: A. providing a brazing preform prepared from an alloy consisting of manganese from 22 to 40%, iron from 0.1 to 2%, aluminum from 0.1 to 5%, zinc from 2 to 10%, balance copper; B. bringing said metal members into joining relationship at at least one joining site and disposing said preform thereat to form a brazing assembly; C. heating said assembly to brazing temperature; D. holding the assembly at said brazing temperature for a period of time sufficient to allow said preform to melt and thereby wet and join said metal members in a brazed joint; and E. allowing said joint to solidify.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said metal members are brought into joining relationship at more than one joining site.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein a welding flux is employed.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein said flux comprises an aqueous bath and said metal members are immersed therein before being brought into joining relationship.
Claim 6
Dependent Claim
19 words
The method of claim 4 wherein immersion in said aqueous bath is conducted after the formation of said assembly.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein said assembly is dried immediately after immersion in said bath.
Claim 8
Dependent Claim
16 words
The method of claim 4 wherein said members are dried immediately after immersion in said bath.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein brazing temperature ranges from about 900° to about 1100°C.
Claim 10
Dependent Claim
15 words
The method of claim 1 wherein said heating step is conducted in a non-oxidizing atmosphere.
Claim 11
Dependent Claim
13 words
The method of claim 9 wherein said non-oxidizing atmosphere comprises an inert gas.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein said alloy contains manganese in an amount from 28 to 32%.
Claim 13
Dependent Claim
17 words
The method of claim 1 wherein said alloy contains iron in an amount of 0.5 to 1.5%.
Claim 14
Dependent Claim
17 words
The method of claim 1 wherein said alloy contains aluminum in an amount from 0.5 to 3.5%.
Claim 15
Dependent Claim
17 words
The method of claim 1 wherein said alloy contains zinc in an amount from 3 to 5%.
Claim 16
Dependent Claim
32 words
The method of claim 1 wherein said alloy consists of manganese from 25 to 35%, iron from 0.5 to 1.5%, aluminum from 0.5 to 3.5%, zinc from 3 to 5%, balance copper.
Claim 17
Dependent Claim
22 words
The method of claim 1 wherein said preform is disposed as a surface cladding on at least one of said metal members.
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |