Influence of Isothermal Transformation Temperature on Mechanical Properties of TRIP-aided Cold-rolled Steel with Aluminum

摘要：

The influence of isothermal transformation temperature on microstructure and mechanical properties in 0. 18C1.54Mn-0.5Si -1.03Al cold rolling TRIP(transformation induced plasticity) steel sheets was investigated,using scanning electron microscopy and X-ray diffraction measurements. The best product of strength and ductility,which is 21．1 GPa·％,is obtained by heat-treating in 840℃×180 s+420℃×240 s. The volume fraction of retained austenite, which is 8. O％(the volulne fraction of ferrite and bainite is 56．6％and 35．4％),is also obtained by this heat treatment process．It is good to enhance the performance of the material by increasing intercritieal annealing time properly at 840℃． Cementite precipitation occurs at the high isothermal transformation temperature,and it will decrease the performance of the material．

关键词： TRIP steel transformation induced plasticity isothermal transformation temperature retained austenite

作者: Zhang Yuguang Zhao Aimin Zhao Zhengzhi Tang Di Ma Hai

作者单位: Research Institute of Metallurgy Engineering,University of Science and Technology Beijing,Beijing 100083,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Automobile Steel(2009年汽车用钢生产及应用技术国际研讨会)

会议地点: 大连

会议语种:英文

页码: 293-297

在线出版日期: 2009-09-06（万方平台首次上网日期，不代表论文的发表时间）