Abstract

This paper reveals the mechanism of crater wear of carbide cutting tool at high cutting speed range which is analyzed using Electron Probe Micro Analyzer. The findings are as follows; (1) The crater wear of the carbide cutting tool is able to classify into following two types, first, the wear which predominates at higher cutting speed and produces fine wear particles, the cause of this type would be attributed to the thermal adhesion between the tool and the chip materials, second is the wear which predominates at lower cutting speed and produces relatively large wear particles. (2) The cause of the latter type of the wear is attributed to the break down of the built-up edge and the “belag”, in this paper, this type of the wear is called “tear by sticking matter”. (3) The volume of the crater wear which is presumed from the density of the wear particles which is detected on the chip surface using EPMA coincides with the measured value at low cutting speed, hence, a new method for rapid tool life testing is proposed.

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