A new type of cobalt-free superhighspeedsteel with good grindability G105 has been developed, and the effect of cobalt on some properties of high speed steels was discussed.
本文研究了新型无钴易磨削超硬高速钢g 105钢的性能，并对钴对高谴钢的一些性能的影响作了探讨。
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Made of super strength highspeedsteel with 4 precisely ground edges make it an efficient, accurate and long lasting tool for mortising.