配分制度对低碳硅锰钢组织性能及残余奥氏体的影响  

Effect of Partitioning System on Microstructure, Mechanical Properties and Retained Austenite of Low Carbon Si-Mn Steel

作　　者：田亚强[1] 张宏军[1] 宋进英[1] 陈连生[1] 

机构地区：[1]河北联合大学河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《热加工工艺》2015年第16期212-214,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(51254004);河北省自然科学基金资助项目(E2014209191);河北省教育厅科研资助项目(YQ2013003)

摘　　要：研究了低碳硅锰钢经I&P&Q和I&Q&P工艺处理后的组织性能。结果表明:经I&P&Q工艺处理得到的马氏体板条较I&Q&P工艺粗大,I&Q&P工艺下的部分板条马氏体形貌模糊;I&P&Q工艺利用Mn配分使钢具有12.6%的伸长率,强塑积16128MPa·%,I&Q&P工艺利用Mn配分和C配分的综合作用,使得伸长率大幅提高,强塑积达到33715 MPa·%;较I&P&Q工艺只有Mn配分作用稳定残余奥氏体,I&Q&P工艺在Mn、C配分共同作用下,使残余奥氏体量较I&P&Q工艺提高了6%。The microstructure and mechanical properties of low carbon Si-Mn steel treated by I＆P＆Q and I＆Q＆P were studied. The results show that the martensite lath after I＆P＆Q treatment is thicker than that of I＆Q＆P process, and the SEM morphology of some lath martensite is fuzzy after I＆P＆Q treatment： The elongation of steel after I＆P＆Q treatment is 12.6% with role of Mn partitioning, and the product of strength and elongation is 16128MPa. %. The elongation of steel after I＆Q＆P process is improved obviously in the combination of Mn and C partitioning, and the product of strength and elongation is up to 33715MPa. %; compared with I＆P＆Q process, retained austenite is stabled only by Mn partitioning, the content of retained austenite of steel after I＆Q＆P process is improved by 6% in the comprehensive effect of Mn and C partitioning.

关 键 词：低碳硅锰钢 I&P&Q工艺 I&Q&P工艺 组织性能 残余奥氏体 

分 类 号：TG156.1[金属学及工艺—热处理] TG115.21[金属学及工艺—金属学]