锻压技术

低氧铜杆连续挤压过程变形行为及组织演化

英文标题：Deformation behavior and microstructure evolution of low oxygen copper rod during continuous extrusion process

单位：1. 辽宁工程技术大学材料科学与工程学院 2. 中国科学院金属研究所师昌绪先进材料创新中心 3. 常州同泰高导新材料有限公司

分类号：TG376

出版年,卷(期):页码：2024,49(10):46-55

摘要：

连续挤压是制备并改善扁线组织的重要方法。首先，结合有限元模拟方法，系统地探究了挤压轮转速对低氧铜3 mm×2 mm规格的扁线成形过程中温度场、速度场和等效应变场的影响规律，获得了最佳连续挤压稳定成形的转速为6 r·min-1。基于模拟结果开展了连续挤压实验，并通过EBSD方法探究了低氧铜杆在连续挤压前后组织及织构演化情况。结果表明：连续挤压后扁线组织再结晶分数可达91.78%；挤压前织构组分以{110}<122>（21.16%）、{110}<112>（15.33%）和{112}<111>（14.51%）为主，经连续挤压后转变为以{110}<112>（29.55%）、{112}<111>（16.67%）和{123}<634>（11.07%）为主的稳定织构。

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%).

基金项目：

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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