Patent ID: 9016987
Filing Date: 2015-04-28
Classification: B23C,Y10T

Abstract:
1. A method for processing a difficult-to-cut cast iron, comprising the steps of: preparing a workpiece made of a difficult-to-cut cast iron; and cutting said workpiece using a cutting tool having a cutting insert, in said step of cutting said workpiece, said cutting tool revolving while rotating to allow said cutting insert to intermittently contact said workpiece, said cutting insert being formed of a sintered body having a CBN content of not less than 85% by volume, said cutting insert having a thermal conductivity of not less than 100 W/(mK), in said step of cutting said workpiece, X is not less than 0.2 μsec and not more than 2 μsec and X/Y is not less than 0.06 and not more than 0.16 where X is a contact time for which said cutting insert and said workpiece contact each other and Y is a noncontact time for which said cutting insert rotates and revolves without contacting said workpiece, and in said step of cutting said workpiece, a cutting speed is not less than 1000 m/min.