Method for consolidating precision shapes

Metal working – Method of mechanical manufacture – Combined manufacture including applying or shaping of fluent...

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75226, 75208R, 29420, 264111, B22D 11126

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active

041047826

ABSTRACT:
A method for consolidating powder metal preforms and for thereby producing high performance metal shapes from powder particles. The powder particles are consolidated into a shaped porous preform, and a coating is then applied to the resulting preform. The coating is initially porous whereby the coated preform can be degasified by subjecting the preform to a vacuum, particularly at elevated temperatures. The coated preform is then heated under vacuum to a temperature such that the coating is densified to the extent that it becomes non-porous. The coated preform is then subjected to a hot isostatic pressing operation whereby formation of a high integrity, fully dense metal shape results.

REFERENCES:
patent: RE28301 (1975-01-01), Havel
patent: 3455682 (1969-07-01), Barbaras
patent: 3469976 (1969-09-01), Iler
patent: 3740215 (1973-06-01), Burk et al.

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