Abstract
Hot machining of carbon steel (C 0.45%) and 13Cr stainless steel was carried out with a ceramic cutting tool. Work material in front of the edge of tool was heated locally by electric current through the tungsten electrode and work material. Cutting resistance at hot machining was compared with that at usual cutting. The following is a summary of the results:
1) Cutting resistance for both materials shows small fluctuation at high cutting speed but large fluctuation under a critical cutting speed ; the effect is great if hot machining is made in such a violent fluctuating. sphere.
2) Cutting resistance decreases with the increase of electric current in the range of low cutting speed.
3) The difference of cutting resistance at hot machining and usual cutting is very small at high cutting speed.
