Process for hot isostatic pressing of a metal workpiece

Details Process for hot isostatic pressing of a metal workpiece Process for hot isostatic pressing of a metal workpiece

1982-02-08

1983-04-12

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 13, 148 203, 432 58, 432205, C21D 153, C21D 178

Patent

active

043797253

ABSTRACT:
A process for hot isostatic pressing of a metal workpiece, such as a ferrous casting. The workpiece is heated in a fluidized particulate bed (sand) to a temperature above the plastic range of the metal (e.g. 2000.degree. F.). Then, the workpiece in the unfluidized bed at this temperature is subjected to a superatmospheric gas pressure above 20,000 psi until internal mechanical property changes have occurred. Lastly, the workpiece is removed from the bed and superatmospheric pressure environment for subsequent utilization.

REFERENCES:
patent: 3397873 (1968-08-01), Ritchie et al.
patent: 4222429 (1980-09-01), Kemp
patent: 4249889 (1981-02-01), Kemp
patent: 4250610 (1981-02-01), Wilbess et al.
patent: 4302256 (1981-01-01), Kenton
patent: 4340433 (1982-07-01), Harding

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