发明名称 |
METHOD FOR MAKING ROCK BITS |
摘要 |
<p>Segments of a rock bit are secured together by electronbeam welding. The segments are slightly spaced apart prior to welding by a thin shim of alloying metal such as titanium which improves ductility of the weld and is a strong carbideformer during welding. The shim is positioned between adjacent segments in the region of the crown or dome of the bit. The resulting welded interface is a fine-grain stress-relieved structure with good ductility and resistance to cracking.</p> |
申请公布号 |
CA1121331(A) |
申请公布日期 |
1982.04.06 |
申请号 |
CA19800358204 |
申请日期 |
1980.08.13 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
FISCHER, JOHN F.;FOOR, ELTON R. |
分类号 |
E21B10/50;(IPC1-7):E21B10/50 |
主分类号 |
E21B10/50 |
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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