发明名称 |
HARDFACING FOR MILLED TOOTH DRILL BITS |
摘要 |
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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申请公布号 |
CA2422551(C) |
申请公布日期 |
2008.02.19 |
申请号 |
CA20032422551 |
申请日期 |
2003.03.18 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
WHITE, ALYSIA;LOCKWOOD, GREG;LIANG, DAH-BEN;GRIFFO, ANTHONY |
分类号 |
C22C29/08;B23K35/32;E21B10/08;E21B10/50 |
主分类号 |
C22C29/08 |
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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