一、前言粉末高速钢组织微细、均匀、没有冶金缺陷,韧性高,可磨削性能好。因此,用粉末高速钢制造形状复杂的切削工具,能进一步提高其韧性和使用寿命。在下述情况下可以充分发挥此种刀具材料良好性能: ①加工硬质材料、难切削材料,熔炼高速钢刀具寿命短,②与以往的刀具相比,需要进行高效率切削,③使用数控机床和自动机床, First, the preface Powder high-speed steel microstructure, uniform, no metallurgical defects, high toughness, good grinding performance. Therefore, the use of powder high-speed steel to create complex shapes of cutting tools, can further improve its toughness and service life. Good performance of this kind of tool material can be brought into full play in the following situations: ① processing hard materials, hard cutting materials, short life of smelting HSS tools, ② high efficiency cutting compared with the conventional tools, ③ using CNC machine tool and Automatic machine tools,