Atmospheres for brazing aluminum and aluminum alloys

Details Atmospheres for brazing aluminum and aluminum alloys Atmospheres for brazing aluminum and aluminum alloys

1993-09-30

1994-08-02

Heinrich, Samuel M.

Metal fusion bonding

Process

With protecting of work or filler or applying flux

22826251, 432 23, B23K 1008, B23K 3538

Patent

active

053337760

ABSTRACT:
Aluminum or aluminum alloys are brazed in the presence of a non-corrosive flux using a low-cost, substantially dry nitrogen atmosphere produced by a non-cryogenic air separation technique such as a pressure swing adsorption (PSA) or a selective permeation (membrane). The use of a substantially dry, non-cryogenically produced nitrogen atmosphere brazed aluminum or aluminum alloy components with consistent good brazed joint quality and appearance while utilizing low loading of the flux.

REFERENCES:
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W. E. Cooke & D. H. Bowman, "Tunnel Furnance Brazing of Aluminum Using a Non-Corrosive Flux" Welding Journal Oct. 1980 pp. 17-20.
Cooke, et al, "Furnance Brazing of Aluminum with a Non-Corrosive Flux" Society of Automotive Engineers, Inc., Feb. 27-Mar. 3 1978 pp. 1-10.
Claydon, "Brazing Aluminum Automotive Heat Exchanger Assemblies Using a Non-Corrosive Flux Process", SAE Technical Paper Series, Feb. 28-Mar. 4, 1983 pp. 1-9.
Boswell, "Advanced Aluminum Brazing Using a Noncorrosive Flux", Spring, Summer 1990, Metal Minutes pp. 6-7.
Heisler, et al, "Atmosphere Aluminum Brazing Combining Efficient Equipment and Process", Fall/Winter 1992, Metal Minutes pp. 6-7&11.

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