Abstract
In this report, surface roughness and tool wear when carbon steel, 18-8 stainless steel and 13Cr stainless steel were cut with ceramic tool under Local Electric Resistance Heating are shown. The results of these experiments are as follows : Case of carbon steel.(1) Until cutting speed exceeds the speed of 160m/min, we can expect to have surface roughness of better quality under or by this hot machining method than under or by usual machining.(2) At a higher cutting speed than 220m/min, surface roughness obtained remains the same whether electric current is used or not.(3) When the depth of cut is large, better surface roughness can be obtained by increasing cutting speed.Case of 18-8 stainless steel and 13Cr stainless steel.(1) A better surface roughness is expected of both of the work materials when this method is used.(2) When this method is used, cratering for 18-8 stainless steel decreases. But for 13Cr stainless steel, cratering little decreases.(3) When machining both of work materials with ceramic tool, cutting speed must be kept at a higher point than 100m/min.
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