Sintered hard metal having superior toughness

Details Sintered hard metal having superior toughness Sintered hard metal having superior toughness

1986-02-25

1988-06-28

Terapane, John F.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75240, 75241, 419 15, 419 16, 419 33, 419 49, C22C 2902, C22C 2906

Patent

active

047536780

ABSTRACT:
A sintered hard metal having superior toughness and superior hardness may be used for micro-drills, tools and wear resistant parts. The metal is a cemented carbide WC formed from tungsten carbide WC as the base alloy and containing 4 to 20 percent by weight of vanadium carbide VC or zirconium nitride. Its micro-structure is that the WC or WC-VC particles are 0.6.mu. or less, its Rockwell Hardness HRA is at least 91.5 and its transverse rupture strength is at least 350 kg/mm.sup.2.

REFERENCES:
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patent: Re22074 (1942-04-01), Schwarzkopf
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patent: 3752655 (1973-08-01), Ranqvist
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patent: 4097275 (1978-06-01), Horvath
patent: 4145213 (1979-03-01), Oskarsson et al.
patent: 4334928 (1982-06-01), Hara et al.
patent: 4610931 (1986-09-01), Nemeth et al.

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