锻压技术

平面应变压缩工艺参数对06Cr19Ni9NbN钢组织及性能的影响

英文标题：Influences of process parameters in plane strain compression on microstructure and property for 06Cr19Ni9NbN steel

单位：太原科技大学

分类号：TG316

出版年,卷(期):页码：2018,43(10):157-162

摘要：

在变形温度1000，1100和1200 ℃下对06Cr19Ni9NbN不锈钢进行平面应变压缩实验，并对压缩后试件进行室温拉伸实验，借助光学显微镜（OM）和DEFORM数值模拟，研究了不同变形量、不同变形温度对该材料微观组织演变和力学性能的影响。结果表明：平面应变压缩实验中，变形量越大，动态再结晶就发生的越充分，晶粒尺寸越小；随着变形温度的升高，动态再结晶体积分数增加；且实验和数值模拟结果基本一致，验证了模拟结果的准确性；动态再结晶体积分数越高，晶粒越小，材料的伸长率、断面收缩率、屈服强度和抗拉强度越高。

The tests of plane strain compression for 06Cr19Ni9NbN steel were conducted under the deformation temperatures of 1000,1100 and 1200 ℃, and the tensile tests at room temperature were conducted after compression. Then, the influences of different deformation ratios and different deformation temperatures on the microstructure evolution and mechanical properties of the material were studied by the optical microscope (OM) and DEFORM simulation. The results show that during the process of plane strain compression, the greater the deformation amount is, the more fully the dynamic recrystallization occurs, and the smaller the grain size is. With the increasing of deformation temperature, the volume fraction of dynamic recrystallization increases, and the simulation results are agreed with the experiment results to verify the accuracy of simulation results. Furthermore, the elongation, area reduction, yield strength and tensile strength of material increase with the increasing of volume fraction of dynamic recrystallization and the decreasing of grain size.

基金项目：

国家自然科学基金资助项目(51275330，51775361)

焦永星(1988-)，男，博士研究生，E-mail：jiaoyxtust@163.com；通讯作者：刘建生(1958-)，男，博士，教授，博士生导师，E-mail:jiansliu@163.com

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