发明名称 |
Differentially hardfaced rock bit |
摘要 |
A method for manufacturing an earth boring drill bit and bit produced thereby are shown. The bit has rotatable cutters with a plurality of milled teeth, each of the teeth having opposing flanks. A first tube hardfacing is applied to a selected one of the opposing flanks, the hardfacing comprising a metallic binder with wear-resistant particles dispersed throughout the binder. The other of the opposing flanks has a second tube hardfacing applied thereto. The particle size of the wear-resistant particles differs between the first and second tube hardfacings so that the resulting difference in abrasion resistance of the tooth flanks produces a self-sharpening effect as the tooth wears.
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申请公布号 |
US4726432(A) |
申请公布日期 |
1988.02.23 |
申请号 |
US19870072315 |
申请日期 |
1987.07.13 |
申请人 |
HUGHES TOOL COMPANY-USA |
发明人 |
SCOTT, DANNY E.;SULLIVAN, ERIC C. |
分类号 |
B23K35/32;C21D9/22;E21B10/50;(IPC1-7):E21B10/50 |
主分类号 |
B23K35/32 |
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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