1.引言高速钢因其组织中有众多而复杂的合金碳化物,给钢丝的冷加工塑性变形带来很大困难。碳化物颗粒愈粗,形状愈不规则;分布愈不均,拉拔起来就愈困难。采取传统的冷拔方法,即使每一道次的拉拔减面宰控制在比较小的范围内,也难免发生拔断的现象; 1. INTRODUCTION HSS has a lot of difficulties in plastic deformation of cold working steel because of its large and complex alloy carbides. The harder the carbide particles, the more irregular the shape; the more uneven the distribution, the harder it is to pull it. To take the traditional cold drawing method, even if each pass of the drawing slaughtering slaughtering slaughter control in a relatively small range, it is inevitable to pull off the phenomenon;