Generally as the toughness of the harden steel is so high that the harden steel is often cutted with PCBN cutting tools. But the price of the PCBN cutting tools is relatively high, moreover the bending strength, shock resistance of the PCBN material are not good enough. When it is used to cut the harden steel, the case of tool failure and very short tool life often occure. This article is based on the demand.
In this thesis, it comes true to finish machining 45 hardened steel in index...
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