文献类型：期刊文献

中文题名：6063铝合金半固态反挤压数值模拟

英文题名：Numerical Simulation of Inverse-squeezing Semi-solid 6063 Aluminum Alloy

作者：王姣姣[1];路贵民[1];尚淑珍[2];方舟[3];李宏华[3]

机构：[1]华东理工大学资源与环境工程学院;[2]华东理工大学机械与动力工程学院;[3]浙江吉利汽车研究院(有限公司)

年份：2010

卷号：30

期号：8

起止页码：714

中文期刊名：特种铸造及有色合金

外文期刊名：Special Casting & Nonferrous Alloys

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(50874049);科技部国际科技合作项目(2008DFB50020)

语种：中文

中文关键词：6063铝合金;半固态;反挤压;数值模拟

外文关键词：6063 Aluminum Alloy,Semi-solid,Inverse-squeezing Process,Numerical Simulation

摘要：对采用近液相线半连续铸造方法制备的6063铝合金半固态坯料进行了热模拟压缩试验。根据试验获得的不同温度与应变速率下的应力-应变曲线,采用有限元软件DEFORM-3D对温度为615～625℃、应变速率为0.1～5.0s-1、最大变形程度为60%条件下的半固态铝合金反挤压成形过程进行了数值模拟。研究了变形程度、变形温度、凸模速度、摩擦因数对成形过程的影响,并对变形工艺参数进行了优化。结果表明,随着变形程度增大,处于大变形区内的材料流动速度与方向变化明显,小变形区也逐渐参与变形,变形的不均匀性更加明显。随凸模速度的增大,坯料流动速度加快,整个变形的不均匀程度加剧,对成形不利。随着变形温度的升高,处于大变形区内的材料等效应变明显增大,而材料各点的等效应力均有所减小。摩擦条件对材料变形的影响不显著。
Thermal simulation compressive experiment was conducted for semi-solid 6063 aluminum alloy billets which was prepared by near-liquidus semi-continuous casting. Based on stress-strain curves at varied temperatures and strain rates,inverse-squeezing process of the semi-solid 6063 aluminum alloy was simulated by the Deform-3D software at 615~625 ℃ with strain rate of 0.1~5s-1 and 60% deformation rate to understand effects of deformation rate,deformation temperature,punch velocity and frictional coefficient and to optimize the processing parameters. The results reveal that with increasing in deformation rates,flow velocity and flow orientation of the alloy in severe deformation zone are distinctly changed,meanwhile,light deformation zone is gradually evolved,which results in the remarkable non-uniformity of deformation. With raising in punch velocity,flow velocity of the billets is accelerated,which is harmful for the formation as a result of aggravating non-uniformity of the whole deformation process. With deformation temperature increase,equivalent strain of the billets in severe deformation zone is obviously increased,while equivalent stress in the billets is decreased. Effects of frictional states on the deformation of billets can be neglected.