新一代热轧TRIP钢的研究  

Study on New-Generation Hot Rolled TRIP Steel

作　　者：刘建勋[1] 李壮[1] 吴迪[1] 迟伟凡[2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]沈阳师范大学,辽宁沈阳110034

出　　处：《东北大学学报（自然科学版）》2006年第4期418-421,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50334010)

摘　　要：对热轧后等温淬火的热轧Si-Mn TRIP钢进行了研究,通过对该钢的组织性能检测,讨论了其相变诱发塑性(TRIP)机制.结果表明:热轧Si-Mn TRIP钢中发生了残余奥氏体的应变诱导马氏体相变,表现出抗拉强度和总延伸率的良好配合.残余奥氏体的稳定性随等温保温时间的增加而增加,进一步增加等温时间则又使残余奥氏体稳定性降低.等温25 min时力学性能最佳,抗拉强度、总延伸率和强韧性平衡分别达到了774 MPa,33%和25 542 MPa%的最高值.The Si-Mn TRIP steel for which the austernpering is done after hot rolling was investigated. Its mechanism of transformation induced plasticity （TRIP） was discussed by testing the microstructure and mechanical properties of the steel. The results showed that the strain-induced transformation into martensite from residual austenite is found in hot-rolled Si-Mn TRIP steel which reveals a proper combination of ultimate tensile strength with total elongation when it is held at the bainite transformation temperature after hot deformation. The stability of residual austenite becomes higher with the increasing isothermal holding time but, if the time increases further, the stability becomes lower. Its mechanical propertie shows optimal if holding 25 min, i. e., the tensile strength, total elongation and balanced strength-ductility are up to 774 MPa, 33% and 25 542 MPa%, respectively.

关 键 词：热轧 等温淬火 残余奥氏体 应变诱导相变 相变诱发塑性 

分 类 号：TG333.7[金属学及工艺—金属压力加工]