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采用数值模拟研究了40Cr钢奥氏体热变形行为。通过JMatPro软件得到本构关系曲线,建立了动态再结晶模型。在Deform-3D平台上将动态再结晶模型和元胞自动机模型结合起来,对40Cr钢高温压缩过程进行模拟仿真。结果表明,40Cr钢平均晶粒尺寸随着压缩变形量的增加而不断变小。当真应变为1时,在大变形区的晶粒尺寸为10.1μm,和相关试验对比误差在±10%以内。元胞自动机模拟可视化再现了动态再结晶过程。
The hot deformation behavior of austenite in 40Cr steel was studied by numerical simulation. Through JMatPro software to get the constitutive relationship curve, the dynamic recrystallization model was established. On the Deform-3D platform, the dynamic recrystallization model and cellular automaton model are combined to simulate the high temperature compression process of 40Cr steel. The results show that the average grain size of 40Cr steel decreases with the increase of compressive deformation. When the true strain becomes 1, the grain size in the large deformation zone is 10.1μm, and the error in the relevant test is within ± 10%. Cellular Automata Visualization reproduces the dynamic recrystallization process.