Method of joining metal parts

Details Method of joining metal parts Method of joining metal parts

1978-02-22

1979-04-24

Lanham, C. W.

Metal fusion bonding

Process

Diffusion type

228213, 29419R, B23K 1900

Patent

active

041507762

ABSTRACT:
The procedure according to the invention, for joining together stainless el or superalloy parts, consists of placing an interface material, chosen from a group containing tin, indium, antimony, gallium and germanium or consisting of a combination of these elements, between the contacting surfaces of the parts, and then subjecting the entire assembly to heat treatment in a controlled atmosphere at a temperature greater than 900.degree. C. but in every case less than the solidus point of the parts to be joined together. If the parts are not of the same nature, the lower solidus point will be the limiting temperature. The treatment lasts as long as necessary to permit the interface material to migrate and compounds or solutions to form, ensuring the diffusion brazing of the parts to be joined. The parts are held together under a moderate pressure during at least part of the treatment, so as to maintain their positions relative to each other and to promote the diffusion without causing deformation.

REFERENCES:
patent: 4038041 (1977-07-01), Duvall et al.
patent: 4059217 (1977-11-01), Woodward

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