连续挤压纯铜扁线的不均匀组织与性能  

Non-uniform microstructure and property of continuous extrusion pure copper flat wire

作　　者：王昕 薛俊鹏 李博轩 李洪晓[1,2] 任玉平 杨绪清[3,4] 杨立山 Wang Xin;Xue Junpeng;Li Boxuan;Li Hongxiao;Ren Yuping;Yang Xuqing;Yang Lishan(Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Materals Science and Engineering,Northestem University,Shenyang 110819,China;Shenyang Hongyuan Magnet Wire Co.,Ltd,Shenyang 110144,China;Mechanical Industrial Winding Wire Engineering Rcsearch Center,Shenyang 110144,China)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]东北大学材料科学与工程学院,沈阳110819 [3]沈阳宏远电磁线股份有限公司,沈阳110144 [4]机械工业绕组线工程研究中心,沈阳110144

出　　处：《材料与冶金学报》2021年第3期223-231,共9页Journal of Materials and Metallurgy

基　　金：沈阳市重大科技创新研发计划(Y19-1-005)。

摘　　要：通过EBSD技术对连续挤压高纯无氧铜扁线进行组织分析,发现连续挤压的高纯无氧铜扁线存在边部位置和中心位置组织分层的现象,线材的平均晶粒尺寸在4.5~5.5μm之间,边部的变形程度大于再结晶程度,中心相反,这种分层组织使得整体线材类似于梯度复合材料;在边部<112>变形丝织构和中心<111>+<001>双丝织构的协调变形下,整体线材的强度提高了8.54%,延伸率提高了7.5%;同时,由于动态再结晶程度的差异,边部退火孪晶的体积分数为17.69%,低于中心的44.8%,因此整体线材的电导率为100.1%IACS,介于边部(99.3%IACS)和中心(101.0%IACS)之间.The microstructure of continuous extrusion high purity oxygen-free copper flat wire has been investigated by using the Electron Backscattered Diffraction(EBSD).The results show that the continuous extrusion of high purity oxygen free copper flat wire has the phenomenon of layered structure at the edge and the center.The average grain size of the wire is 4.5~5.5μm.The layered structure makes the whole wire similar to the gradient composite material.The deformation degree of the edge is greater than the recrystallization degree,but that of the center is opposite.Under the coordinated deformation of edge<112>deformed fiber texture and center<111>+<001>twin fiber texture,the strength and elongation of the whole wire increase 8.54%and 7.5%,respectively.Meanwhile,due to the difference in the degree of the dynamic recrystallization,the content of annealing twins at the edge is 17.69%,which is lower than that of the center,44.8%.Thus,the conductivity of the whole wire is 100.1%IACS,which is between the edge(99.3%IACS)and the center(101.0%IACS).

关 键 词：连续挤压 高纯无氧铜 显微组织 力学性能 导电性能 

分 类 号：TG146.11[一般工业技术—材料科学与工程]