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通过热模拟压缩实验,得到06Cr19Ni9NbN不锈钢的动态再结晶数学模型。采用平面应变压缩实验,结合光学显微镜(OM)观察,及DEFORM有限元模拟,研究了不同变形量和变形温度对该材料微观组织演变的影响。结果表明,实验结果和模拟结果基本一致,验证了所建立动态再结晶模型的准确性;热变形过程中,随着变形量增大,动态再结晶体积百分数增大,晶粒尺寸减小;随着变形温度的增加,动态再结晶体积百分数和晶粒尺寸均增大;热变形过程中可通过控制变形量和变形温度优化材料组织,为实际生产工艺提供依据。
The dynamic recrystallization mathematical model of 06Cr19Ni9NbN stainless steel was obtained by thermal simulation compression experiment. The effect of different deformation and deformation temperature on the microstructure evolution of the material was studied by plane strain compression experiment combined with OM and DEFORM finite element simulation. The results show that the experimental and simulation results are basically the same, and the accuracy of the established dynamic recrystallization model is verified. With the increase of the deformation, the volume fraction of dynamic recrystallization increases and the grain size decreases. With the increase of deformation temperature, the volume percent of dynamic recrystallization and the grain size increase. The deformation and deformation temperature can be used to optimize the microstructure of the material during the thermal deformation process, which provides the basis for the actual production process.