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用热加工模拟试验机对X65钢进行了高温压缩试验，建立了试验用钢的奥氏体热变形方程式及动态再结晶临界条件回归方程式。根据动态再结晶动力学，通过应力-应变曲线建立了如下动态再结晶体积分数数学模型
X65 steel was subjected to high temperature compression test by hot processing simulation testing machine, and the austenite thermal deformation equation and dynamic recrystallization critical condition regression equation of the test steel were established. According to dynamic recrystallization kinetics, the following dynamic recrystallization volume fraction mathematical model was established by stress-strain curve