Vacuum brazing of nickel to aluminum

Details Vacuum brazing of nickel to aluminum Vacuum brazing of nickel to aluminum

1975-01-16

1976-09-07

Smith, Al Lawrence

Metal fusion bonding

Process

Plural joints

228221, 228263, 29197, B23K 104

Patent

active

039790428

ABSTRACT:
A method for brazing nickel to aluminum in a vacuum and product produced thereby. The outer surface of the aluminum member to which the nickel member is to be brazed is precoated with a layer containing silicon and magnesium. The nickel and aluminum members are placed together in an oven at reduced pressures and heated to a temperature of approximately 593.degree.C cracking the oxide coating upon the aluminum sheet. The presence of magnesium and silicon in the surface of the aluminum sheets makes possible an excellent braze with a large filleted area. The process may be further adapted for brazing other metal components to aluminum by first precoating the component with nickel.

REFERENCES:
patent: 2920385 (1960-01-01), Fike et al.
patent: 3373483 (1968-03-01), Miller
patent: 3375570 (1968-04-01), Dubusker et al.
patent: 3482305 (1969-12-01), Dockus et al.
patent: 3675310 (1972-07-01), Schwaneke et al.
patent: 3703758 (1972-11-01), Beck, Jr.
fenton, Ed. Brazing Manual pp. 31, 38, 39, 131 and 139 American Welding Soc. N.Y., N.Y. 1963.

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