通讯作者：Zicheng Zhang

发表刊物：Materials Science Forum

卷号：654-656

DOI码：10.4028/www.scientific.net/MSF.654-656.290

摘要：In this study, the effects of isothermal bainite treatment (IBT) holding time on the microstructure of transformation induced plasticity (TRIP) seamless steel tube were studied via optical microscopy, TEM and XRD. Its mechanical properties and hydroformability were evaluated by tensile test and flaring test, respectively. The results revealed that the volume fraction of retained austenite (RA) increased at first then decreased with IBT holding time for a particular set of intercritical annealing (IA) temperature, IA holding time and IBT temperature. It was also demonstrated that high tensile strength of 618MPa, total elongation of 35.5%, n-value of 0.23 and better hydroformability could be successfully produced in this TRIP steel tube at IA temperature of 800 degrees C, holding for 10 min, and IBT of 410 degrees C for 4 min holding time.

关键字：TRIP steel;retained austenite;seamless steel tube;hydroformability;cold drawing

页面范围：290-293

是否译文：否