高速度鋼工具の摩耗機構に関する研究 (第3報)

巨視的工具損傷とその要因

抄録

This paper describes the mutual relation of macroscopic tool's failure and microscopic wear mechanism (described in 2nd Report) during iron and steel cutting. The results are as follows :
(1) Tool's failure made chiefly wear with built-up edge. The forms of tool's failure are classified into five types in the case of such work materials as forms a nose-type built-up, edge. While in the case of a flat-type built-up edge, tools show a simple form of its failure.
(2) Each built-up edge, tool's failure in the high cutting speed is affected by cutting temperature, then the rake face wear increases so large.
(3) Chip-breaker and surface treatment layer out of effective factors for tool's failure give different types against the tool wear.