Transactions of Materials and Heat Treatment

Title：Deformation behavior and microstructure evolution of low oxygen copper rod during continuous extrusion process

Authors： Yang Zhi1 Li Fengyong1 Yang Baocheng2 Wang Songwei2 Cheng Ming2 Song Hongwu2 Shao Jun3 Han Mingqi3

Unit： 1.College of Materials Science and Engineering Liaoning Technical University 2.Shi-changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences 3.Changzhou Tongtai High Conductivity New Materials Limited Company

KeyWords： low oxygen copper rod continuous extrusion rotating speed of extrusion wheel flat wires texture

ClassificationCode：TG376

year,vol(issue):pagenumber：2024,49(10):46-55

Abstract：

Continuous extrusion is an important method to produce and improve the microstructures of flat wire. Therefore, the influence laws of the rotating speed of extrusion wheel on the temperature field, velocity field and equivalent strain field during the forming process of low oxygen copper flat wire with 3 mm×2 mm were systematically investigated by the finite element simulation method, and the optimal rotating speed for the stable forming of continuous extrusion was obtained as 6 r·min-1. Then, based on the simulation results, the continuous extrusion experiment was conducted, and the evolutions of microstructure and texture of the low oxygen copper rod before and after continuous extrusion were investigated by electron back scatter diffraction (EBSD) method. The results show that the recrystallization fraction of the flat wire after continuous extrusion reaches 91.78%. Before continuous extrusion, the textures components are mainly {011}<122>(21.26%), {110}<112>(15.33%) and {112}<111>(14.51%), and after continuous extrusion, they transform into stable textures mainly composed of {110}<112>(29.55%), {112}<111>(16.67%) and {123}<634>(11.07%).

Funds：

重庆市自然科学基金创新发展联合基金（CSTB-2023NSCQ-LZX0116）

作者简介：杨志（1973-），男，硕士，副教授,E-mail：yangzhi279@163.com;通信作者：杨宝成（1993-），男，博士，助理研究员,E-mail：bchyang19b@imr.ac.cn

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