发明名称 |
METHOD FOR THE PRODUCTION OF SINTERED BODIES WITH INTERNAL PASSAGES |
摘要 |
A drilling tool which has at least one helical fluid flow channel at its interior, is composed of a hard metal core having an exterior surface and a hard metal tubular casing having an interior surface. The casing encloses the core with their surfaces in firm contact so that the core and casing form a composite body. Each channel is formed as a groove in the surface of the core or casing. |
申请公布号 |
GB8910056(D0) |
申请公布日期 |
1989.06.21 |
申请号 |
GB19890010056 |
申请日期 |
1989.05.02 |
申请人 |
FRIED KRUPP GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG |
发明人 |
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分类号 |
B23B51/06;B21C23/14;B21C25/02;B22F3/20;B22F5/10;B22F7/06;B23B51/02;B23P15/32;C22C29/08 |
主分类号 |
B23B51/06 |
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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