Effect of Hot Machining on Rolling Fatigue Life of Machined Surface

In the wake of the rapid development of the hot machining in recent years, the electric resistance heating, among other methods, has been proved to be very useful in improving the machinability, not only in turning, but in drilling and milling as well. On the other hand, the development of ceramic tools which excell in heat resistance, in concert with the development of machine tools, has brought about the higher and higher cutting speed, and there have been experiments performed at such a high speed as 2000m/min. In the present study, the hot machining of S35C, S45C and S55C carbon steel was conducted by the use of a carbide tool under local electric resistance heating, and my report is mainly on rolling fatigue life and work hardening.