发明名称 |
Drill and a Production Method for a Drill |
摘要 |
A drill includes a drill bit, an intermediate part, and a shaft. The drill bit is made from a sintered carbon-containing hard metal. The intermediate part is made from steel and arranged along an axis between the drill bit and the shaft. An activity of carbon in the steel of the intermediate part is greater at a temperature ranging from 1100° C. to 1450° C. than an activity of carbon in the sintered hard metal at the temperature.
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申请公布号 |
US2013089384(A1) |
申请公布日期 |
2013.04.11 |
申请号 |
US201213601089 |
申请日期 |
2012.08.31 |
申请人 |
GLASER ARNO;MOSELEY STEVEN |
发明人 |
GLASER ARNO;MOSELEY STEVEN |
分类号 |
B23B51/02;B22F7/04;B25D17/02 |
主分类号 |
B23B51/02 |
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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