Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1975-11-06
1977-05-17
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75214, 425 78, 264 56, 264125, B22F 300
Patent
active
040239667
ABSTRACT:
This invention involves a method for the hot isostatic compaction of particulate material into an article of intricate configuration. It comprises providing a removable pattern in the appropriate precompaction configuration of the article to be produced, coating the pattern with a first layer of conductive material and a second layer of metallic material, the two layers cooperating to provide a self-supporting and gas-impervious shell around the pattern and removing the pattern from the shell to provide a self-supporting and gas-impervious container having an internal configuration corresponding to the precompaction shape of the article to be produced. The container is then filled with particulate material, evacuated and sealed, and isostatically compacted in a pressure vessel at elevated temperature until the particulate material is compacted into a dense article of complex shape. The container is thereafter removed to obtain the compacted article. Dense articles of complex shape, such as gas turbine engine components including blades, discs and the like, are readily produced by the method of the invention.
REFERENCES:
patent: 3450528 (1969-06-01), Thompson
patent: 3622313 (1971-11-01), Havel
patent: 3804575 (1974-04-01), Chandhok
patent: 3841870 (1954-10-01), Hamjian
Hurwitz Peter Alan
Jordan Lester Warren
Loersch Joseph Frederick
Hunt Brooks H.
Timmer Edward J.
United Technologies Corporation
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