C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
18/1120, 75/166,
C22C 1/05 (2006.01) B22F 1/00 (2006.01) C22C 33/02 (2006.01)
Patent
CA 1177287
Abstract of the Disclosure A sintered powdered metal article having a density approaching theoretical is provided by a process which minimizes the amount of fine particles required to obtain satisfactory densification upon sintering. This unique article is produced by a novel process which comprises (a) providing base metal particles having a median particle size greater than 40 microns; (b) providing alloy forming particles having a median particle size of 20 microns or less, with the alloy forming particles being alloyable with said base metal particles; (c) mixing the alloy forming particles with the base metal particles so as to form a particle mixture capable of being sintered to near theoretical density which mixture contains a minor amount of alloy forming particles; (d) compacting the mixture of alloy forming particles and base metal particles into an article of the desired configuration having a green density sufficient to render the so-produced article capable of being sintered to near theoretical density; and (e) sintering the article at a temperature below that at which any liquid phase is formed in the article to produce a sintered article which has a density approaching that of theoretical.
365197
Imperial Clevite Inc.
Marcoux & Sher Swabey Mitchell Houle
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