中国机械工程Issue(9)：1256-1260,1261,6.DOI:10.3969/j.issn.1004-132X.2014.09.022
22 MnB5热变形行为研究及本构方程建立
Study on Hot Deformation Behavior and Flow Stress Constitutive Model of 22MnB5 at High Temperature
曹淑芬 1张立强 1郭鹏程 2李落星1
作者信息
- 1. 湖南大学汽车车身先进设计与制造国家重点实验室，长沙，410082
- 2. 中南林业科技大学，长沙，410004
- 折叠
摘要
Abstract
Hot tensile tests of 22MnB5 were carried out with Gleeble-1500 at the temperatures va-rying from 500℃ to 950℃ and at the strain rates of 0.01s-1 ,0.1s-1 ,1s-1 to study its hot deforma-tion behavior at high temperature.Afterwards,microstructure analysis of the cross sections of speci-mens was conducted to clarify the relationship between microstructure and hot deformation of boron steel under different conditions.The results show that the mechanism of hot deformation of 22MnB5 belongs to dynamic recovery and that the flow stress decreases with the increase of temperature and with the reduction of strain rate.In addition,the influence of temperature is more obvious than it of strain rate.However,the flow stress at the temperature of 500℃ and at the strain rate of 0.01s-1 is higher and the result seems a little different to the above law.Finally,constitutive model was estab-lished to represent the behavior of hot deformation of boron steel at high temperature.关键词
硼钢/热变形行为/显微组织/本构模型Key words
boron steel/hot deformation behavior/microstructure/constitutive model分类
矿业与冶金引用本文复制引用
曹淑芬,张立强,郭鹏程,李落星..22 MnB5热变形行为研究及本构方程建立[J].中国机械工程,2014,(9):1256-1260,1261,6.
