Research on edge microstructure characteristics and stamping formability of low carbon picked steel sheet
The microstructure characteristics and formability of the edge of picked steel sheet are investigated based on the phenomenon that earing and cracking are often appear at these area during drawing.There are coarse grains and mixed size grains in the edge microstructure.The strength of sheet edge is lower lightly than that of middle of sheet and the formability becomes worse obviously.The plastic strain ratios of longitudinal and transverse orientations are 0.31 and 0.6 respectively with distinct anisotropy,being lower obviously than that of middle of steel sheet.The characteristics of microstructure and mechanical properties at the edge of the steel sheet are caused by the lower rolling temperature of two phase regions of pro-eutectoid Ferrite and Austenite.The difference between microstructures and mechanical properties at the edge of the steel sheet lead to the earing and cracking defects during drawing.While the microstructures and properties at the edge of low carbon picked steel sheet can be improved by the optimization of rolling process and adjustment of chemical composition.
picked steel sheet microstructure formability stamping earing cracking
PEI Xinhua ZHOU Liping LIU Xuewei
The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,Liaoning, Technology Center,Shanghai Meishan Iron & Steel Co.,Ltd.,Nanjing 210039,Jiangsu,China
国内会议
上海
英文
1-4
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）