Method of manufacturing an article by diffusion bonding

Details Method of manufacturing an article by diffusion bonding Method of manufacturing an article by diffusion bonding

1993-06-30

1994-02-08

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

228186, 228193, 228221, B23K 2014, B23K 2018

Patent

active

052842886

ABSTRACT:
A plurality of titanium sheets are assembled into a stack. One of the sheets is provided with a stop off material on one surface to prevent diffusion bonding at predetermined positions. The edges of the sheets are welded together and a pipe is welded to the stack to interconnect with the stop off material to form a sealed assembly. The sealed assembly is evacuated. The sealed assembly is heated to evaporate the binder from the stop off and the binder is extracted from the assembly. The pipe is then sealed by two spaced welds. The assembly is heated and externally pressurized to diffusion bond the sheets together. The region of the pipe between the assembly and the first seal and the region of the pipe between both seals collapse to indicate a successful diffusion bond, or one or both regions are uncollapsed to indicate an unsuccessful diffusion bond. An integral structure formed by a successful diffusion bond is then superplastically formed to produce an article.

REFERENCES:
patent: 3066390 (1962-12-01), Jack
patent: 3066393 (1962-12-01), Malagari
patent: 4538756 (1985-09-01), Trenkler et al.

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