Abstract
Tool wear and cutting resistance were larger for the alloy strengthened by harder ceramic particles, and took maximum for alloys containing Al2O3 or SiC. Further, they increased simultaniously during machining, and were related uniquely to the cutting distance irrespective of the cutting speed. The tool wear proceeds mainly by mechanical abrasion due to ceramic particles in the alloys. The principal cutting force originates from the friction force due to tool wear. However, the wear of a sintered diamond tool was small even for alloys containing Al2O3 or SiC, suggesting that tool wear and cutting resistance also are reduced in case that the hardness of particles in a tool exceeds that in a work material.
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