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Anil Kumar, Larry P Pelty: High-strength tungsten carbide material for use in earth-boring bits. Baker Hughes Incorporated, Felsman Bradley Gunter & Dillon, January 25, 1994: US05281260 (87 worldwide citation)

A sintered hard metal compact for use in earth-boring bits comprises 80 to 94% by weight tungsten carbide particles, 5.4 to 18% by weight cobalt particles and 0.6 to 2.0% by weight nickel particles wherein the ratio of cobalt to nickel is approximately 9:1 by weight. These materials are formed accor ...


2
Pelty Larry Paul, Kumar Anil: High strength tungsten carbide material for use in earth boring bits. Baker Hughes Incorporated, DESAI Umesh M, September 2, 1993: WO/1993/017142

A sintered hard metal compact (20) for use in earth-boring bits (11) comprises 80 to 94 % by weight tungsten carbide particles, 5.4 to 18 % by weight cobalt particles and 0.6 to 2.0 % by weight nickel particles wherein the ratio of cobalt to nickel is approximately 9:1 by weight. These materials are ...



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