Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1986-03-28
1987-08-04
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75241, 1481261, 419 15, 419 18, 419 29, 419 38, 419 53, 419 54, 419 57, 419 58, 419 60, C22C 2908
Patent
active
046844058
ABSTRACT:
A sintered tungsten carbide material and method for manufacturing same in which the method includes the steps of combining metal particles composed of from 75 to 95 percent by weight of a composition containing at least 70 percent by weight of tungsten carbide and from 5 to 25 percent by weight of a binder metal composition, the binder metal composition consisting essentially of from 5 to 15 percent by weight of chromium and from 85 to 95 percent by weight of nickel; pressing the metal particles into a pressed body; sintering the pressed body in a sintering chamber for a period ranging from 20 to 200 minutes, at a temperature ranging from 1400.degree. to 1500.degree. C., and in a protective atmosphere which is one of a vacuum, a noble gas, a mixture of noble gases, and hydrogen gas to form a sintered body; and treating the sintered body for a period ranging from 20 to 200 minutes, at a temperature ranging from 1300.degree. to 1400.degree. C., at a pressure ranging from 20 to 3000 bar, and in a noble gas atmosphere. The pressure/temperature treatment step densifies the sintered composition and results in an unexpectedly stronger and tougher sintered metal.
REFERENCES:
patent: 3215510 (1965-11-01), Kelly et al.
patent: 3918138 (1975-11-01), Nemeth et al.
patent: 3964878 (1976-06-01), Scheithauer et al.
patent: 4024902 (1977-05-01), Baum
patent: 4146080 (1979-03-01), Baum
patent: 4276096 (1981-06-01), Kolaska et al.
patent: 4466829 (1984-08-01), Nishigaki et al.
patent: 4497660 (1985-02-01), Lindholm
R. Kieffer et al, "Hartmetalle", 1965, Springer-Verlag, Vienna/New York, pp. 220, 221 and 228.
Kolaska Johannes
Reiter Norbert
Fried. Krupp GmbH
Lechert Jr. Stephen J.
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