Study on Tool Wear in End-milling of Hardened Die Steel

本文研究了用（Al,Ti） n涂层刀具铣削模具用端铣硬化钢。研究了低合金钢和高合金钢的端铣削性能，淬火硬度达到HRC53。很明显，刀具的寿命取决于三种不同的现象：磨料磨损，大晶粒碳化物的刮擦磨损，以及在铣削各种淬硬钢用于模具和模具时的附着力。在高速立铣削中，切削过程中产生的大部分热量被切屑带走。结果表明，在高速立铣刀削过程中，刀具温度的小幅升高使刀具寿命的延长成为可能。

This study deals with end-milling hardened steels for die and molds using (Al,Ti)N-coated cutter. We researched the characteristics of end-milling low- and high-alloy steels, hardened up to HRC53. It is clear that the life of a tool depends on three different phenomena : abrasive wear, scratching wear by large grain carbide, and adhesion, when end-milling various kinds of hardened steels for die and molds. In high speed end-milling, most of the heat generated is borne away by chips in the cutting process. It is confirmed that little increase in tool temperature makes it feasible to achieve long tool life in high speed end-milling.