Hardfacing for milled tooth drill bits

Details Hardfacing for milled tooth drill bits Hardfacing for milled tooth drill bits

C - Chemistry, Metallurgy

22

C

C22C 29/08 (2006.01) E21B 10/08 (2006.01) E21B 10/50 (2006.01)

Patent

CA 2422551

In one embodiment, a hardfacing composition for a drill bit, including a carbide phase including from about 50% to about 80% by weight of the hardfacing composition of a combination of 80 to 200 mesh macro-crystalline tungsten carbide and 80 to 200 mesh crushed cast carbide, the crushed cast carbide being about 5% to 50% of the total weight of the carbide phase, and a binder alloy comprising about 20% to about 50% by weight of the hardfacing composition is disclosed. A hardfacing composition for a drill bit, including a carbide phase composed of sintered tungsten carbide having a particle size from about 80 to 200 mesh that is about 50% to about 80% by weight of the hardfacing composition, and a binder alloy forming about 20% to about 50% by weight of the hardfacing composition.

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