2008 杨王玥 基于动态相变热轧C_Mn_Si系TRIP钢的组织和性能 890MPa-30%.pdfVIP

30 3 Vol . 3 0 No . 3 2 0 0 9 6 TRANSACT IONS OF MATERIALS AND HEAT T REATMENT June 2 00 9 CMnSi TRIP 1 1 1 2 2 2 尹云洋, 杨王 , 李建成, 李龙飞 , 孙祖庆, 王西涛 ( 1. , 100083 2. , 100083) : , CMnSi TRIP , , TRIP 7 50 , TRIP : TRIP : TG 14221 : A : 2009) 0300 8405 Microstructure and mechanical properties of hot rolled CMnSi TRIP steel based on dynamic transformation 1 1 1 2 2 2 YIN Yunyang , YANG Wangyue , LI Jiancheng , LI Longfei , SUN Zuqing , WANG Xitao ( 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 . The State Key Laboratory for Advanced Metals and Materials , University of Science and Technology Beijing, Beijing 100083, China) Abstract: The microstru cture and mech anical prop erties of hot rolled CMnSi TRIP steel based on dynamic tran sformation of undercooled austenite w ere investigated by uniax ial hot compression tests on a Gleeble 1500 simulation test machine. The result s show that the microstructure obtained by the hot rolled process based on dynamic transform ation of undercooled austenite consist s of a ferrite matrix w ith a m ixture of bainite, retained austenite. The grain size of f errite is fine and the b ainitic packet s are small w ith chaotic orientations. The granular retained austenite distributes uniformly and has higher volume fraction. Compared w ith the conventional hot rolled technology based on isotherm al transform ation , th