Method for forming patterns of brazing alloy

Details Method for forming patterns of brazing alloy Method for forming patterns of brazing alloy

1977-11-21

1979-06-05

Lanham, C. W.

Metal fusion bonding

Process

With supplementary mechanical joining

228174, 228211, 228254, B23K 104

Patent

active

041571541

ABSTRACT:
Brazing alloy on detailed aluminum parts is formed in an exact pattern of the joints to be brazed. An aluminum sheet having brazing alloy coated on one or both sides (e.g., a brazing sheet) is plated with electroless nickel and electrolytic copper which are etched by use of a photoresist mask into a mask which outlines the pattern. The brazing alloy coating is then chemically milled to form the exact pattern of the joints. Parts are then assembled and dip brazed to form the completed brazed unit.

REFERENCES:
patent: 2192275 (1940-03-01), Melchior et al.
patent: 2545527 (1951-03-01), Maxwell
patent: 3483616 (1969-12-01), Shomphie
patent: 3487520 (1970-01-01), Lenhart et al.

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