发明授权
US07258177B2 Fracture and wear resistant compounds and rock bits 有权
断裂和耐磨化合物和岩屑

Fracture and wear resistant compounds and rock bits
摘要:
An insert for a rock bit that includes tungsten carbide particles, and a cobalt binder disposed around the particles, wherein a grain size of the tungsten carbide particles and a content of the cobalt binder are selected to provide a fracture toughness of at least about 18 ksi (in)0.5, a wear number of at least about 2, and a hardness of 85 to 87 Ra is disclosed.
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