Abstract
A fundamental relation for crater wear of carbide cutting tools is proposed by considering the mechanism of metal wear and the speciality in the friction process on the tool face. Tool-life tests of carbide cutting tools in machining of Cr-Mo steel are carried out by varying the tool feed, cutting speed and rake angle of cutting tools in wide range, and cutting temperature is estimated in each case. These results ascertain the validity of fundamental relation for crater wear proposed, meaning that depth of crater wear is in proportion to the specific wear of tool material, shear stress on the rake face and rubbing distance by chips, and that the specific wear of tool material depends only on the tool-face temperature. Lastly, the methods of improvement in tool-life for crater wear are discussed in the light of these results obtained.
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