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公开(公告)号:US4756373A
公开(公告)日:1988-07-12
申请号:US946442
申请日:1986-12-23
摘要: A rock drilling bit comprises a steel body defining a cutting face with hard material inserts press-fitted into preformed openings in the cutting face. The inserts have ends extending outwardly of the cutting face which perform the actual drilling or cutting operation. The face surface of the body is case hardened except for narrow continuous bands about each insert opening. A method particularly suited for forming the case hardened cutting face is also disclosed.
摘要翻译: 岩石钻头包括限定切削面的钢体,硬质材料刀片压配合到切削面中的预成型开口中。 插入件具有从切割面向外延伸的端部,其执行实际的钻孔或切割操作。 除了围绕每个插入开口的窄连续带外,机体的表面被表面硬化。 还公开了一种特别适用于形成壳体硬化切割面的方法。