Metal fusion bonding – Process – Diffusion type
Patent
1975-07-28
1976-04-27
Smith, Al Lawrence
Metal fusion bonding
Process
Diffusion type
B23K 1900
Patent
active
039529398
ABSTRACT:
A method is disclosed for metallurgically bonding a protective sheet cladding to a convex-concave substrate such as an airfoil or turbine blade. According to the method of the invention, a preassembled sheet cladding and substrate is masked at all seams. The masked assembly is then placed in a deformable container with the remaining volume filled with glass chips. The container is thereafter outgassed and sealed air-tight. The container is then placed in a hot gas autoclave for diffusion bonding. During the diffusion bonding step, the glass melts and the container deforms thereby ensuring an isostatic stress state. The bonded clad-substrate is subsequently removed from the container for final cleaning.
REFERENCES:
patent: 3235958 (1966-02-01), Gauthron
patent: 3699642 (1972-10-01), Lange
patent: 3736638 (1973-06-01), Stone
patent: 3815219 (1971-03-01), Wilson
Beltran Adrian M.
Schilling William F.
Wasielewski Gerald E.
Ahern John F.
General Electric Company
Joyce Margaret
Mitchell James W.
Smith Al Lawrence
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