TiC-Cr3C2系複合セラミック工具の切削特性に関する研究

概要

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In recent years, many ceramic and cermet tools with various kinds of properties have appeared on the market. The purpose of this paper is to clarify the tool life of TiC-Cr3C2 compound ceramic tool on the prototype for the machining of carbon steel at high cutting speed. The tool life was studied and discussed upon both continuous and intermittent cutting by turning. The cutting speed for examination was 250m/min and 300m/min. The results obtained are as follows; (1) In continuous cutting, tool life of TiC-Cr3C2 compound ceramic tool was larger than those of cermet and ceramic tools. (2) In intermittent cutting, the chamfer angle of 30°on the edge gives the longest tool life. In this case, the failure on the tool edge was caused by pile up of micro chipping. (3) Since TiC-Cr3C2 compound ceramic tool shows good cutting performance to the carbon steel, the cermet tool will be replaced by this tool.