摘要
基于在Gleeble-3800上的热压缩实验,计算30CrMoA钢的本构方程,并建立了其动态再结晶模型。采用有限元分析软件对30CrMoA薄壁筒形件挤压和变薄拉深成形进行优化,并做了实验对比。得出结果:在条件为1100℃和150 mm·s-1的挤压速度时,可得到最小的挤压晶粒尺寸;在温度为970℃和挤压速度为50 mm·s-1时,可得到最优变薄拉深件晶粒尺寸;实验和数值模拟结果基本相符,验证了对于30CrMoA钢微观组织的演变可以利用所建立的本构方程及动态再结晶模型进行预测。为进一步研究30CrMoA钢在热变形下的零件的成形和组织演变规律提供了依据。
The thermal compression experiment was conducted by Gleeble-3800,the constitutive equation was calculated and the dynamic recrystallization model of 30CrMoA was established.The extruding and thinning drawing of 30 CrMoA thin wall cylinders were optimized by the finite element analysis software,and the comparison of simulation and experiment was carried out.The results show that the smallest grain size of extrusion can be obtained when the deformation temperature is 1100℃and the extrusion speed is 150 mm·s-1,and the optimum grain size of thining drawing parts is obtained when the deformation temperature is 970℃and the extrusion speed is 50 mm·s-1.The consistency of simulation and experiment results indicate that the microstructure evolution of 30CrMoA can be predicted by the above constitutive equation and dynamic recrystallization model,which provides a basis for further research on the forming and microstructure evolution of 30CrMoA parts under thermal deformation.
作者
徐蒙蒙
李洪波
郭猛
白英博
Xu Mengmeng;Li Hongbo;Guo Meng;Bai Yingbo(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066000,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2019年第8期71-79,共9页
Forging & Stamping Technology
