发明名称 |
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)<SUP>0.5</SUP>, a wear number of at least about 2, and a hardness of 85 to 87 Ra is disclosed. |
申请公布号 |
GB2399841(B) |
申请公布日期 |
2006.06.21 |
申请号 |
GB20040006732 |
申请日期 |
2004.03.25 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
DA-BEN LIANG;ANTHONY GRIFFO |
分类号 |
E21B10/56;C22C29/08;E21B10/08;E21B10/16;E21B10/52;E21B17/10 |
主分类号 |
E21B10/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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