Research on edge microstructure characteristics and stamping formability of low carbon picked steel sheet

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• 作者：PEI XinhuaZHOU LipingLIU Xuewei
• 会议时间：2013-06-01
• 关键词：picked steel sheet ; microstructure ; formability ; stamping ; earing ; cracking
• 作者单位：PEI Xinhua(The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110004,Liaoning,China;Technology Center,Shanghai Meishan Iron & Steel Co.,Ltd.,Nanjing 210039,Jiangsu,China)ZHOU Liping,LIU Xuewei(Technology Center,Shanghai Meishan Iron & Steel Co.,Ltd.,Nanjing 210039,Jiangsu,China)
• 母体文献：第五届宝钢学术年会论文集
• 会议名称：第五届宝钢学术年会
• 会议地点：上海
• 主办单位：中国金属学会
• 语种：chi

摘要

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.