【作者】 张红梅； 李胜利； 刘相华； 王国栋；

【Author】 Zhang Hongme~(1*), Li Shengli~1, Liu Xianghua~2, Wang Guodong~2 (1.An-shan science & technology university , An-shah 114002, China; 2.State Key Lab of Rolling and Automatic, Northeastern University, Shen-yang 110006, China)

【机构】 鞍山科技大学材料科学与工程学院材料系； 东北大学轧制技术及连轧自动化国家重点实验室；

【摘要】 本文利用双道次压缩的方法,在Gleeble 1500热模拟实验机上研究了低碳钢SS400在变形间隔时间内奥氏体的软化行为,以便为制定合理的细化晶粒轧制工艺提供实验和理论基础。采用后插法计算了在不同真应变条件下的静态再结晶率,通过双道次压缩测试静态软化动力学实验的表明,实验钢变形后很容易发生静态软化。在真应变为0.4,0.2时,静态再结晶激活能分别是Q_rec=189.3,179.2kJ/mol。更多还原

【Abstract】 In this paper, the softening behavior of Austenite in delay time of deformation was studied on the Gleeble 1500 thermo-mechanical simulator for the low carbon steel SS400, and it can supply the experimental and theory base for establishing the proper rolling process of grain refinement. The static recrystallization rate was calculated by the way of back-extrapolation under the different true strain. It shows that the static softening of this steel can be easily occurred after deformation by the testing static softening dynamic experiment of two-pass compression. The static recrystallization activation energy is 189.3, 179.2 kJ/mol, as the strain is 0.4, 0.2 respectively.更多还原