Process for hardening sponge refractory metals and pressing to f

Details Process for hardening sponge refractory metals and pressing to f Process for hardening sponge refractory metals and pressing to f

1990-06-01

1992-01-14

Andrews, Melvyn J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Powder pretreatment

419 66, 75612, 75618, C22B 3414

Patent

active

050808591

ABSTRACT:
A process for hardening sponge refractory metal and making it more susceptible to crushing by the addition of oxygen and/or nitrogen gas to either the reduction stage of the production of the metal from a tetrachloride thereof with magnesium, or to the treatment of a regulus of such metal following vacuum distillation thereof.

REFERENCES:
patent: 4749409 (1988-06-01), Ishizuka

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