Cemented carbide

Details Cemented carbide Cemented carbide

1992-12-24

1994-02-22

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

75228, 75236, 75240, 75242, 4285395, C04B 3556

Patent

active

052886760

ABSTRACT:
A cemented carbide of the invention contains at least one of cobalt and nickel; calcium, sulfur, aluminum, silicon and phosphorus; balance tungsten carbide; and unavoidable impurities. The content of cobalt or nickel should range from 4 to 35% by weight. The content of each of calcium, sulfur, aluminum and silicon should be no greater than 50 ppm by weight, while the content of phosphorus should be no greater than 20 ppm by weight. The tungsten carbide has an average crystal grain size of 0.2 to 1.5 micrometers. The cemented carbide may further contain 0.1 to 40% by weight of at least one compound which may be carbides of metals in Groups IVa, Va and VIa of the Periodic Table other than tungsten, nitrides of metals in Groups IVa and Va of the Periodic Table and solid solution of at least two of the carbides and nitrides.

REFERENCES:
patent: 3409418 (1968-11-01), Yates
patent: 3409419 (1968-11-01), Yates
patent: 3451791 (1969-06-01), Meadows
patent: 3669695 (1972-06-01), Iler et al.
patent: 4046517 (1977-09-01), Soga
patent: 4047897 (1977-09-01), Tanaka et al.
patent: 4375517 (1983-03-01), Watanabe et al.
patent: 4652157 (1987-03-01), Uzawa et al.
patent: 4963183 (1990-10-01), Hong
Patent Abstracts of Japan, vol. 10, No. 161 (C-352) (2217), Jun. 10, 1986.
Patent Abstracts of Japan, vol. 11, No. 63 (C-406) (2510), Feb. 26, 1987.
Hiashi Suzuki (editor), Cemented Carbide and Sintered Hard Material, Feb. 20, 1986, pp. 547-549, Maruzen Kabushiki Kaisha (publisher).

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