Isostatic compression technique for powder metallurgy

Details Isostatic compression technique for powder metallurgy Isostatic compression technique for powder metallurgy

1984-09-18

1986-10-07

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

419 31, 419 42, 419 44, 419 53, 419 54, 419 55, 419 49, 419 63, 419 67, 419 68, 420528, 420540, 420541, 420542, 420547, 420548, 420550, C22C 100

Patent

active

046157352

ABSTRACT:
Powder metallurgy products of high tensile strength are formed in a pore-free state by a novel process which entirely avoids the use of canisters. An open-pore specimen is purged with depurative gas, backfilled with a reactive gas and, while still immersed in the reactive gas, compressed isostatically to an extent necessary to close the pores. The specimen may then be compressed to full density without the need for either high vacuum or a depurative or reactive gas atmosphere.

REFERENCES:
patent: 3954458 (1976-05-01), Roberts
patent: 4063940 (1977-12-01), Dain et al.
patent: 4104061 (1978-08-01), Roberts
patent: 4435213 (1984-03-01), Hildeman et al.
patent: 4587096 (1986-05-01), Mankins et al.

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