A PROCESS FOR IMPROVING THE TOOL LIFE OF HIGH SPEED STEEL TOOLS

摘要

A process for improving the tool life of high-speed steel tools by hardening and tempering in the conventional manner characterized in that conventionally hot-worked and mill-annealed high-speed steel tool bits are first prior austenitized at upto 900degrees C for one hour, then annealed at upto 798degrees C for eight hours and air cooled.