Method of brazing aluminum

Details Method of brazing aluminum Method of brazing aluminum

1991-01-25

1992-03-31

Seidel, Richard K.

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22826317, 148 24, B23K 3528

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active

051000482

ABSTRACT:
A novel method is described for joining aluminum surfaces by brazing. The method comprises (a) applying as a coating to at least one of the aluminum surfaces to be joined a mixture of a metal and a brazing flux, the metal of the mixture being adapted to form a brazable eutectic with the aluminum, (b) heating the surfaces and the coating in juxtaposed relation to a temperature above the brazing alloy melting point to thereby dissolve oxide film on the surface to be joined, cause the metal of the coating to dissolve into the oxide-free aluminum surface and form therewith a brazing alloy layer and form a brazed assembly and (c) cooling the brazed assembly to form a solidified joint between the surfaces. This has the advantage of providing for the joining of aluminum surfaces by brazing without the prior formation of a brazing alloy cladding on the surfaces to be brazed.

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Metals Handbook 9th ed., vol. 6 "Brazing of Aluminum Alloys", pp. 1022-1027, 1983.

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