Abstract
This paper describes the experimental research concerning the wear of high speed steel tools. By orthogonal cutting of mild steel with a specially designed tool, we tried to find the process of the wear, especially flank wear and crater wear, the tool contour at the end of tool life, the effect of cutting conditions on the tool wear, and so on. As a result, we obtained the following facts : (1) The best way to express the wear of high speed steel tool is to measure the wear volume. (2) The development of flank wear and crater wear is not continuous. (3) From the standpoint of wear, it is preferable to use large rake angle and clearance angle as far as chattering of tool is not induced. (4) In general, built-up edge does not protect the tool point from wear.
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