异步热轧高锰无磁钢剪切应变场有限元分析  

Analysis on Shear Strain Field for High Manganese Non-magnetic Steel in Hot Asymmetrical Rolling Process Using the Finite Element Method

作　　者：赵峻 周玉 王晓玉 童宣宝 ZHAO Jun;ZHOU Yu;WANG Xiao-yu;TONG Xuan-bao(School of Mechanical Engineering,Chaohu University,Chaohu Anhui 238000)

机构地区：[1]巢湖学院机械工程学院

出　　处：《巢湖学院学报》2019年第6期110-115,146,共7页Journal of Chaohu University

基　　金：巢湖学院校级科学研究项目(项目编号:XLY-201805、XLY-201807)

摘　　要：采用有限元软件MSC.Marc,并基于刚塑性有限元法的仿真模型对高锰无磁钢的异步热轧过程进行数值模拟,分析了轧制过程中初轧温度、压下量和异速比对轧件稳定变形区上、下表面和心部节点剪切应变的影响规律。研究结果表明:当异速比为1.00时,板坯心部节点剪切应变为0,并由心部向表面逐渐增加;随着异速比和压下量的增加,中间层和下表面节点最大剪切应变绝对值呈现上升趋势,上表面节点的最大剪切应变绝对值先减后增;随着初轧温度的增加,上、下表面节点最大剪切应变绝对值呈现下降趋势,中间层节点最大剪切应变绝对值呈现上升趋势。异速比和压下率的变化对剪切应变的分布具有较大的影响,初轧温度的变化对其分布的影响较小。Based on rigid-plastic finite element method, the asymmetrical rolling process of high manganese nonmagnetic steel was simulated by finite element software MSC.Marc. The influence of rolling temperature, reduction rate and speed ratio on the shear strain of upper, lower surface and center of the middle section during rolling was analyzed. The results show that: when the speed ratio is 1.00, the shear strain at the center of slab is zero and increases gradually from the center to the surface. With the increase of speed ratio and reduction rate, the absolute value of the maximum shear strain of the middle and lower surface nodes increases, and the absolute value of the maximum shear strain of the upper surface increases first, then decreases. With the increase of rolling temperature,the absolute value of maximum shear strain of upper and lower surface nodes shows a downward trend, while the absolute value of maximum shear strain of intermediate nodes shows an upward trend. The variation of speed ratio and reduction rate has a great influence on the distribution of shear strain, while the variation of rolling temperature has less influence on the distribution of shear strain.

关 键 词：高锰无磁钢 异步热轧 剪切应变 刚塑性有限元法 

分 类 号：TG335.11[金属学及工艺—金属压力加工]