发明名称 |
CORPO DE CARBURETO CEMENTADO USADO DE PREFERENCIA PARA A PERFURACAO DE ROCHAS E CORTE DE MINERAIS |
摘要 |
The present invention relates to cemented carbide bodies preferably for rock drilling and mineral cutting. By having the bodies comprising a core of cemented carbide containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase and having a low content of cobalt in the surface and a higher content of cobalt next to the eta-phase zone the bodies have obtained an increased strength and life in practical use. |
申请公布号 |
BR8505668(A) |
申请公布日期 |
1986.08.12 |
申请号 |
BR19858505668 |
申请日期 |
1985.11.11 |
申请人 |
SANTRADE LIMITED |
发明人 |
UDO KARL REINHOLD FISCHER;ERIK TORBJOERN HARTZELL;JAN GUNNAR HJALMAR AKERMAN |
分类号 |
C22C29/08;C23C8/20;C23C30/00;E21B10/56;(IPC1-7):E21B10/00 |
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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