【摘要】 研究了预处理工艺对W6Mo5Cr4V2高速钢组织与性能的影响。试验结果表明，与退火预处理相比，调质预处理的奥氏体晶粒细小，未溶碳化物少，残留奥氏体是多，屈服强度高，仍应力区疲劳寿命长，但抗弯强度、塑性、冲击韧度、断裂韧性都较低，高应力区疲劳寿命也短。更多还原

【Abstract】 This paper deals with the influence of conditioning on microstructure and properties of W6Mo5Cr4V2 high speed steel. The results show that compared with annealing as conditioning treatment,the microstructure after conditioning with quenching and tempering has finer austenite grains,fewer undissolved carbides, and more retained austenite. Because of this, it shows higher yield strength and longer fatigue life in low stress region,but the bending strength,ductility,impact toughness and fracture toughness are lower and fatigue life in high stress region is shorter too.更多还原