Dimensionally-controlled cobalt-containing precision molded...

Details Dimensionally-controlled cobalt-containing precision molded... Dimensionally-controlled cobalt-containing precision molded...

C - Chemistry, Metallurgy

22

C

75/163, 75/1.3

C22C 1/04 (2006.01) B22F 3/26 (2006.01) C22C 1/05 (2006.01)

Patent

CA 1182309

Abstract of the Disclosure The shrinkage normally encountered in the powder metallurgy process of molding a mixture of spherical cobalt-containing particles and thermoplastic binder, heating the resulting molded article to degrade the binder and form a porous preform, and infiltrating the same is counteracted by adding finely divided elemental iron or elemental nickel to the spherical cobalt-containing particles. In addition to improving dimensional control, the elemental powder addition increases impact strength while maintaining hardness.

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