通过Gleeble-1500热模拟机上的高温压缩实验(温度800 ～1100℃；应变速率范围0.1～10s-1),研究了Fe-Cr-Ni超级奥氏体不锈钢的高温热变形行为.显微组织观察表明,在高温大应变速率条件下,可获得细小的再结晶晶粒;再结晶晶粒尺寸与参数Z呈指数关系.此外,通过对实验数据的计算和线性回归,分别得到试验钢的热激活能(为466.14 kJ/mol)、热变形的本构方程、不同温度与应变速率下的峰值应力和Zener-Hollomon (Z)参数,其中,峰值应力和发生动态再结晶的临界应力与参数Z呈线性关系.
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