热变形奥氏体静态再结晶行为的研究

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的实验表明，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Qmc=189．3、170.2kJ／mol。

Study on static-recrystallization behavior of hot deformation austenite

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,which supplies the experimental and theoretical base for establishing the proper rolling process of grain refinement.The static recrystallization rate was calculated under different true strain by the way of back-extrapolation.Two-pass compression dynamic experiments on static softening behavior of SS400 shows that the static softening of this steel can easily occurr after deformation.The static recrystallization activation energy is 189.3 and 179.2 kJ/mol respectively,when the strain is 0.4 and 0.2.