Fine grain tungsten heavy alloys containing additives

Details Fine grain tungsten heavy alloys containing additives Fine grain tungsten heavy alloys containing additives

1988-01-04

1989-12-05

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

414 53, 414 54, 414 47, C22C 2704

Patent

active

048850314

ABSTRACT:
A consolidated tungsten heavy alloy body consisting essentially of from about 88% to about 98% by weight of nickel, from about 0.25% to about 1.5% by weight of a grain size reducing additive selected from the group consisting of ruthenium, rhenium and mixtures thereof, balance iron and nickel in a weight ratio of nickel to iron of from about 1:1 to about 9:1 wherein the consolidated body has greater than about 2500 grains per square millimeter as determined from the microstructure of the body. A process for producing the consolidated body comprises forming a relative uniform blend of the described metal powders, compacting the powders to form a green body then solid state sintering to remove binders followed by liquid phase sintering the green body to full density.

REFERENCES:
patent: 3301641 (1967-01-01), Krock et al.
patent: 3888636 (1975-06-01), Sczerzenie et al.
patent: 3988118 (1976-10-01), Grierson et al.

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