纯镁细丝拉拔的有限元模拟  

Finite Element Simulation of the Drawing Process for Pure Magnesium Thin Wire

作　　者：王昌[1] 艾迪 于振涛[1] 刘少辉[1] 余志远 何卫敏 Wang Chang;Ai Di;Yu Zhentao;Liu Shaohui;Yu Zhiyuan;He Weimin(Shaanxi Key Laboratory of Biomedical Metal Materials,Northwest Institute for Nonferrous Metal Research;School of Materials Science and Engineering,Northeastern University)

机构地区：[1]西北有色金属研究院、陕西省医用金属材料重点实验室 [2]东北大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2018年第8期850-852,共3页Special Casting & Nonferrous Alloys

基　　金：陕西省工业科技攻关资助项目(2016GY-210);陕西省重点研发计划资助项目(2017ZDXM-SF-039)

摘　　要：以热压缩本构方程为基础,控制不同的摩擦因数、拉拔速度以及道次变形量,对纯镁细丝的拉拔工艺进行了有限元模拟。结果表明,随着摩擦因数的增加,拉拔力、应变不均匀度、最大主应力均增加;随着拉拔速度的增加,拉拔力变化不大,应变不均匀度、最大主应力逐渐增加,当拉拔速度高于60mm/s时,最大主应力急剧增加;随着道次变形量的增加,断裂倾向值增加,当道次变形量大于15%时,断裂倾向值显著增加。纯镁细丝较优的拉拔工艺参数:摩擦因数为0.08,拉拔速度低于60mm/s,道次变形量为10%~15%。The drawing process of pure magnesium thin wire was numerically simulated by controlling the different friction coefficients,drawing speeds and the amount of pass deformations based on the constitutive equations established by the thermal compression.The results reveal that drawing force and strain non-uniformity as well as maximum main stress are increased with the increase of the friction coefficient.With the increase of drawing speed,the change of drawing force can be ignored,while the strain non-uniformity and the maximum main stress are increased gradually.The maximum main stress is increased dramatically when the drawing speed is more than 60 mm/s.With the increase of pass deformation,the fracture tendency value is increased and it is increased sharply at pass deformation exceeding 15%.Therefore,the optimized drawing parameters of pure magnesium thin wire are presented as follows：the friction coefficient of 0.08,the drawing speed less than 60 mm/s and the pass deformation in range of10%~15%.

关 键 词：纯镁细丝 有限元模拟 摩擦因数 拉拔速度 道次变形量 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TG146.22[自动化与计算机技术—计算机科学与技术]