Effect of cooling process after rolling on microstructure and property of Nb-Ti micro-alloyed low-carbon bainite steel
The influence of cooling process on microstructure,second phase precipitation and mechanical property of Nb-Ti Micro-alloyed Low-Carbon Bainitic Steel has been examined by metalloscope and TEM.The results lustrate that accelerated cooling after air-cooling (relaxation) to a certain temperature could obtain ferrite / bainite dual phase structure.The reduction of relaxation stop temperature results in increases of the volume of ferrite phase and grain size,and second phase size has trendy of grow up,the shape of bainite has change,while the bainite lath boundaries and the orientation become less obvious,dislocation density decreases,and the shape of M/A island changes,which leads to lower strength but improve yield ratio and ductility.
Nb-Ti Micro-alloyed steel Low-Carbon Bainite Cooling Process Microstructure Property
Defa Li Haiyan Bao Shisen Wang Yuzhang Xiong Shuqing Xing Tao Xiong
Research and Development Center of Wuhan Iron and Steel Group,430080,China;School of Materials and M Heavy Plate Plant,Wuhan Iron and Steel Group Echeng Iron and Steel Co.,LTD.,Ezhou,436002,China Research and Development Center of Wuhan Iron and Steel Group,430080,China School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,014010,China
国际会议
沈阳
英文
1577-1580
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）