Effect of Quenching Heating Rate on Microstructure and Mechanical Properties of the Cold Rolled 980 MPa Dual Phase Steel
摘 要
用扫描电镜、透射电镜、拉伸试验机等研究了淬火加热速率对980 MPa双相钢显微组织和力学性能的影响。结果表明: 在5~150 ℃·s-1加热速率范围内加热后淬火时, 随加热速率的增大, 铁素体晶粒有细化的趋势, 马氏体尺寸更加均匀, 抗拉强度增加到1 300 MPa后基本保持不变, 其屈服强度和伸长率先增加后减小, 当加热速率为100 ℃·s-1时, 综合性能最好, 抗拉强度为1 328 MPa, 伸长率约为13%, 屈强比为0.32。
Abstract
The effect of heating rate before quenching on microstructure and mechanical properties of the 980 MPa dual phase steel was investigated by means of scanning electron microscopy, transmission electron microscopy, tensile testing machine. The results show the ferrite grains refined and the martensite size got more uniformly with increasing the heating rate from 5 ℃·s-1 to 150 ℃·s-1. Tensile strength of the steel increased to 1 300 MPa, and then almost kept no changes. The yield strength and elongation increased firstly and decreased afterward. When heating rate was 100 ℃·s-1, the combination properties was best and the tensile strength was 1 328 MPa, the elongation was about 13% and the yield ratio was 0.32.
中图分类号 TG146.1
所属栏目
基金项目 上海市博士后科研资助计划重点项目(09R21420300);上海市科技人才计划项目(10XD1420300)
收稿日期 2010/4/28
修改稿日期 2010/12/20
网络出版日期
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备注吴小航(1986-), 男, 安徽马鞍山人, 硕士研究生。
引用该论文: WU Xiao-hang,LI Jun,GUO Wen-yuan,ZHANG Kai,WU Ya-ting. Effect of Quenching Heating Rate on Microstructure and Mechanical Properties of the Cold Rolled 980 MPa Dual Phase Steel[J]. Materials for mechancial engineering, 2011, 35(5): 27~30
吴小航,李俊,郭文渊,张凯,忤亚婷. 淬火加热速率对980 MPa冷轧双相钢显微组织和力学性能的影响[J]. 机械工程材料, 2011, 35(5): 27~30
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参考文献
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【3】ZEYTIN H C, KUBILAY C, AYDIN H. Investigation of dual phase transformation of commercial low alloy steels: Effect of holding time at low inter-critial annealing temperatures[J].Material Letters, 2008, 62(17/18) : 2651-2653.
【4】韩会全, 刘彦春, 崔席勇, 等.退火和缓冷工艺对双相钢组织性能的影响[J].轧钢, 2009, 26(1): 18-21.
【5】康永林.现代汽车板工艺及成形理论与技术[M].北京:冶金工业出版社, 2009.
【6】张增良, 宋仁伯, 程知松.800 MPa级冷轧双相钢的工艺与组织性能研究[J].上海金属, 2007, 29(5): 160-163.
【7】胡赓祥, 蔡珣.材料科学基础[M].上海: 上海交通大学出版社, 2000.
【8】SANDIP G C, ELENA V P. Evolution of texture at the initial stages of continuous annealing of cold rolled dual-phase steel: Effect of heating rate[J].Mater Sci Eng A, 2008, 480(1/2): 540-548.
【9】梁轩.冷轧双相钢连续退火初期的显微组织演化[J].世界钢铁, 2006, 6(3) : 20-26.
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