Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1975-04-07
1976-11-16
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75200, 75225, 75226, 75214, 264111, B22F 314
Patent
active
039922006
ABSTRACT:
A method and assembly for producing compacted powder metallurgy articles wherein powdered metal of a composition corresponding to that desired in the article is introduced to a porous mold corresponding generally to the desired configuration of the article, the mold is placed in a container sealed against the atmosphere and having a secondary pressure media in solid, particle form therein and surrounding the mold. This assembly is heated to elevated temperature for compacting and compacted by the application of pressure to the assembly. The improvement of the invention comprises mixing with the secondary pressure media a reactive metal selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, which acts as a getter for impurities, such as oxygen and nitrogen, present in the secondary pressure media. This prevents oxide and nitride formation in the final compacted article.
REFERENCES:
patent: 3364976 (1968-01-01), Reding et al.
patent: 3627521 (1971-12-01), Vordahl
patent: 3700435 (1972-10-01), Chandhok
patent: 3899821 (1975-08-01), Ito et al.
Crucible Inc.
Hunt Brooks H.
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