介绍了预报奥氏体经多道次塑性加工时应力应变行为的集成模型.研究了试验钢加热等温过程奥氏体晶粒尺寸.在Gleeble 3800试验机上完成了系列单道次和双道次热压缩变形试验.采用Kocks-Mecking加工硬化物理模型,建立了奥氏体单道次变形过程应力应变本构关系模型.应用Johnson-Mehl-Avrami-Kolmogorov (JMAK)方程,建立了奥氏体热变形后静态再结晶动力学模型.多道次变形行为由奥氏体变形应力应变本构模型和变形结束后静态再结晶软化动力学模型描述.预报了双道次连续变形过程奥氏体的流变应力,计算结果和试验测得的结果相吻合.
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