Method of brazing employing bag-group homogeneous microcrystalli

Details Method of brazing employing bag-group homogeneous microcrystalli Method of brazing employing bag-group homogeneous microcrystalli

1989-03-06

1990-05-29

Godici, Nicholas P.

Metal fusion bonding

Process

With pretreating other than heating or cooling of work part...

228248, 148 24, 164463, B23K 3514, B23K 3528

Patent

active

049288725

ABSTRACT:
A brazing process is disclosed for joining two or more metal parts. The metal parts are brazed by interposing between the parts to be joined a brazing paste composed of a homogeneous microcrystalline rapidly solidified alloy powder having a composition consisting essentially of about 15 to 40 weight percent copper, 0 to 32 weight percent zinc, 0 to 24 weight percent cadmium, 0 to 3 weight percent nickel and 0 to 10 weight percent tin, the balance being silver and incidental impurities, and a phase structure such that the largest dimension of any precipitated phase ranges from about 0.01 to 0.1 micrometer, heating the powder to melt the powder, and thereafter cooling the parts to produce a brazed product. The brazing process can be carried out at lower temperatures as compared to prior art processes employing conventional BAg-alloy powders.

REFERENCES:
patent: 4448853 (1984-05-01), Fischer et al.
patent: 4528247 (1985-07-01), Mizuhara
patent: 4805686 (1989-02-01), Skinner et al.

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