发明名称 |
DRILL BIT FOR DRILLING AND METHOD FOR MANUFACTURING SAME |
摘要 |
Disclosed are a drill bit for drilling and a method for manufacturing same, in which the strength of a body part of a shank can be selectively improved by performing rapid cooling in a forced cooling method after performing rapid heating selectively only on the body part of the shank in a high-frequency induction heating method after completing infiltration. |
申请公布号 |
WO2016064083(A1) |
申请公布日期 |
2016.04.28 |
申请号 |
WO2015KR09086 |
申请日期 |
2015.08.28 |
申请人 |
EHWA DIAMOND INDUSTRIAL CO., LTD. |
发明人 |
KIM, KI-HO;YUN, JUN-YONG |
分类号 |
E21B10/02;B23P5/00;C21D9/22;E21B10/46 |
主分类号 |
E21B10/02 |
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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