Q-P(-T)工艺对35Si2Ni2钢组织和力学性能的影响  

Effect of Q-P(-T) Process on Microstructure and Mechanical Properties of 35Si2Ni2 Steel

作　　者：王存宇[1] 时捷[1] 刘苏[1] 董瀚[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁》2010年第1期79-82,共4页Iron and Steel

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。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.

关 键 词：马氏体钢 Q—P工艺 Q-T工艺 屈强比 残余奥氏体 

分 类 号：TG151[金属学及工艺—热处理]