摘要
为获得合理的Cu-20Ag合金线材连续拉拔工艺及综合性能更为优异的线材质量,基于Deform有限元软件对Cu-20Ag合金线材多道次连续拉拔过程进行了数值模拟研究,获得了等效应力和等效应变的分布信息,利用点追踪功能分析了多道次连续拉拔过程中线材芯部沿径向到圆周表层的应力和应变的变化情况。并对通过多道次连续拉拔实验制备得到的线材进行了显微组织和断口形貌分析,获得了合金的组织演变规律。结果表明:Cu-20Ag线材表层金属的变形程度比芯部更为剧烈,且随着拉拔道次的增加,线材纵截面各处的等效应力和等效应变值都不断增大。经过多道次连续拉拔,线材纵截面的连续纤维组织近似完全平行于轴向,组织间距逐渐变小且越来越密集,线材组织的细化和均匀化程度也得到了明显增加。
To obtain reasonable continuous drawing process of Cu-20 Ag alloy wire and better wire quality,the multi-pass continuous drawing process of Cu-20 Ag alloy wire was numerically simulated based on Deform finite element software,and the distribution information of equivalent stress and equivalent strain was obtained.The change of stress and strain from the core of wire along the radial direction to the surface of circumference in the multi-pass continuous drawing process was analyzed using the point tracking function.The microstructure and fracture morphology of the wire obtained by multi-pass continuous drawing experiment were analyzed,and the microstructure evolution of alloy was obtained.The results show that the deformation degree of the surface metal for Cu-20 Ag wire is more severe than that of the core metal,and with the increase of drawing pass,the equivalent stress and equivalent strain in the longitudinal section of wire increase continuously.After multi-pass continuous drawing,the continuous fiber structure in the longitudinal section of the wire is approximately parallel to the axial direction completely,the spacing of fiber structure gradually becomes smaller and denser,and the degree of refinement and homogenization of the fiber structure also increases significantly.
作者
吴捍疆
宋克兴
张彦敏
周延军
曹军
丁雨田
吕长春
胡勇
WU Han-jiang;SONG Ke-xing;ZHANG Yan-min;ZHOU Yan-jun;CAO Jun;DING Yu-tian;LÜ Chang-chun;HU Yong(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;School of Mechanical Engineering,Henan Polytechnic University,Jiaozuo 454000,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Henan Youke Electronic Materials Co.,Ltd.,Jiyuan 454650,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第4期75-81,共7页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(U21A2051)
中国工程科技发展战略河南研究院2021年战略咨询研究项目(2021HENZDA02)
河南省创新引领专项(191110210400)
河南省自然科学基金资助项目(202300410139)
河南省重点研发与推广专项(212102210441)
河南科技大学研究生创新基金资助项目(CXJJ-2021-KJ08)。
关键词
Cu-20Ag合金
多道次连续拉拔
组织演变
数值模拟
Cu-20Ag alloy
multi-pass continuous drawing forming
microstructure evolution
numerical simulation
