Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1985-05-07
1986-12-02
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75245, 75254, C22C 2900
Patent
active
046262814
ABSTRACT:
A composition of matter having a Rockwell A hardness of at least 85 is formed from a precursor mixture comprising between 3 and 10 weight percent boron carbide and the remainder a metal mixture comprising from 70 to 90 percent tungsten or molybdenum, with the remainder of the metal mixture comprising nickel and iron or a mixture thereof. The composition has a relatively low density of between 7 to 14 g/cc. The precursor is preferably hot pressed to yield a composition having greater than 100% of theoretical density.
REFERENCES:
patent: Re21730 (1941-02-01), Schwarzkopf
patent: 2200258 (1940-05-01), Boyer
patent: 2916809 (1959-12-01), Schell et al.
patent: 3367398 (1968-02-01), Riley et al.
patent: 3386812 (1968-06-01), Sheinberg
patent: 3672936 (1972-06-01), Ehrenrich
patent: 4212670 (1980-07-01), Shveikin et al.
patent: 4400213 (1983-08-01), Sheinberg
Brookes, World Dictionary and Handbook of Hard Metals, 3rd Ed., 1982, published by Engineers' Digest Ltd. & International Carbide Data, pp. 1 to 57.
Brookes Anne
Gaetjens Paul D.
Hageman Joseph M.
Hightower Judson R.
Lechert Jr. Stephen J.
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