Q-P(-T)工艺对35Si2Ni2钢组织和力学性能的影响

来源期刊：钢铁2010年第1期

论文作者：王存宇 时捷 刘苏 董瀚

文章页码：79 - 82

关键词：马氏体钢； Q-P工艺； Q-T工艺； 屈强比； 残余奥氏体

Key words：martensitic steel； Q-P process； Q-T process； yield ratio； retained austenite

摘    要：研究了"淬火-配分-(回火)"(Q-P(-T))工艺处理对35Si2Ni2钢显微组织和力学性能的影响,并与传统的淬火回火(Q-T)工艺进行比较,用SEM、TEM、XRD分析了微观组织。试验结果表明:相对于传统Q-T工艺,经Q-P工艺处理后得到了较多的残余奥氏体,强度水平稍有降低,而塑韧性明显提高,经Q-P工艺处理后再进行回火处理,残余奥氏体分解,析出ε碳化物,导致Q-P工艺处理钢的屈服强度升高,屈强比升高。

Abstract: The effect of "Quenching-Partitioning-(Tempering)(Q-P(-T)) process on the microstructure and mechanical properties of 35Si2Ni2 steel were investigated,and compared them with traditional Quenching-Tempering(Q-T) process.Microstructure was studied by using SEM,TEM and XRD.The results show that samples treated by quenching-partitioning get more retained austenite compared with traditional quenching-tempering process,the strength decrease slightly,while the ductility and toughness improved markedly.Retained austenite of the samples treated by quenching-partitioning-tempering process decomposited and ε carbides precipitated,which resulted the increasing of yield strength,as well as the yield ratio.