Fe5Mn3Al中锰汽车用钢热变形本构方程的研究  

Constitutive equation of Fe5Mn3Al medium-Mn automobile steel

作　　者：王晋斌 郝润元[1] 李华英[1] 刘光明[2] Wang Jinbin;Hao Runyuan;Li Huaying;Liu Guangming(Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Science and Technology, Taiyuan 030024, China;School of Materials Science and Engineering,Taiyuan University of Science and Technology, Taiyuan 030024, China)

机构地区：[1]太原科技大学重型机械教育部工程研究中心,太原030024 [2]太原科技大学材料科学与工程学院,太原030024

出　　处：《材料与冶金学报》2019年第3期219-225,共7页Journal of Materials and Metallurgy

基　　金：山西省科技重大专项(MC2016-01);太原科技大学博士启动基金(20142034)

摘　　要：本文研究了Fe5Mn3Al中锰汽车用钢的热变形行为,在温度为 950~1 150 ℃时,应变速率为0.1~ 20 s^-1 .用Gleeble3800热模拟试验机进行单道次热压缩试验,通过对试验获得的流变应力数据的回归分析,构建双曲正弦Arrhenius方程以描述中锰汽车钢Fe5Mn3Al的高温变形行为,其热变形激活能为 503.931 kJ/mol .本构方程对Fe5Mn3Al试验钢流变应力进行预测,模型预测值与试验值有很好的一致性,精度较高,平均相对误差为3.25%.In this paper, the hot deformation behavior of Fe5Mn3Al was studied by hot compression tests on Gleeble 3800 thermo-mechanical simulator in the temperature range of 950~ 1 150 ℃ and the strain rate range of 0.1~ 20 s^-1 . Based on the regression analysis of the flow stress data, the constitutive equation of Fe5Mn3Al steel was developed to describe the hot flow behavior of medium-Mn automobile steel, and the hot deformation activation energy Q is 503.931 kJ/mol. The flow stresses were predicted by the established constitutive equation. The calculated flow stress values show good agreement with the experimental results, and the average absolute relative error (AARE) is 3.25%.

关 键 词：Fe5Mn3Al中锰钢 热变形行为 本构方程 激活能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]