中文摘要：

利用SEM、金相显微镜、X射线应力测定仪、MTS万能试验机等研究了淬火-等温(Q-I)及淬火-等温-回火(Q-I-T)工艺对60Si2CrVA弹簧钢组织及性能的影响,并与传统工艺进行了比较。结果表明,经Q-I工艺处理的60Si2CrVA弹簧钢具有良好的综合力学性能,抗拉强度可达到2142 MPa,断面收缩率为42.17%,冲击吸收能量达到了43.3 J。Q-I工艺得到的复相组织中较多的残留奥氏体与下贝氏体是提高材料塑韧性的主要原因。

英文摘要：

The influence of quenching-isothermal ( Q-I ) and quenching-isothermal-tempering ( Q-I-T ) processes on microstructure and mechanical properties of 60Si2CrVA steel was studied by SEM, optical microscopy, X-ray stress analyzer, MTS and so on, and compared with the traditional treatment .The results show that the 60Si2CrVA steel treated by Q-I process has fine comprehensive mechanical properties, tensile strength is 2142 MPa, the percentage reduction of area is 42.17%, and the impact absorbed energy is 43.3 J.The duplex microstructure with many retained austenite and bainite obtained by Q-I is the main factor to improve the toughness and ductility .