不同变形量和变形温度对06Cr19Ni9NbN不锈钢微观组织演变的影响  

Influence of different deformation and temperatureon microstructure evolution for 06Cr19Ni9NbN stainless steel

作　　者：焦永星 刘建生[1] 郑晓华[1] 姚媛蓉 

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《塑性工程学报》2016年第3期133-138,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51275330)

摘　　要：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。Based on the results of thermo-simulation experiments, the dynamic recrystallization （DRX） mathematical models of 06Cr19Ni9NbN steel were derived. The microstructure evolution of the steel under different temperatures and deformation degrees was investigated and simulated by plane strain compression tests and finite element method. The results show that the predicted results are consistent with the experimental results, which confirms that the constitutive models are accurate and can be successfully used to predict microstructure evolution for the steel. As the deformation degree increases, the volume fraction of DRX increases and the grain size decreases. The volume fraction of DRX and the grain size increase with the increase of the deformation temperature. These results have a significant guiding value to optimizing the production process for the steel.

关 键 词：变形量 变形温度 晶粒尺寸 微观组织演变 

分 类 号：TG317[金属学及工艺—金属压力加工]