铜包铝金属C-ECAP过程数值模拟及实验验证  

Numerical simulation and experimental verification of C-ECAP process for copper-clad aluminum metal

作　　者：郭廷彪[1,2] 姚子鹏 丁唯桐 王欢 辛婵 张国庆[1,2] 凌得魁 GUO Ting-biao;YAO Zi-peng;DING Wei-tong;WANG Huan;XIN Chan;ZHANG Guo-qing;LING De-kui(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Nickel and Cobalt Resource Comprehensive Utilization,Jinchang 737100,China)

机构地区：[1]兰州理工大学有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]镍钴资源综合利用国家重点实验室,甘肃金昌737100

出　　处：《材料热处理学报》2025年第1期206-214,共9页Transactions of Materials and Heat Treatment

基　　金：甘肃省重点科技研发项目(22YF7GA158,22ZD6GA008,20YF8GA056);国家自然科学基金(51861022)。

摘　　要：采用连续等通道转角挤压技术(C-ECAP)制备了铜包铝金属材料,采用DEFORM-3D软件模拟了C-ECAP过程中的剪切作用对铜包铝金属结合方式及性能的影响,探索双金属结构的塑性变形机理,研究变形过程中温度场、速度场以及应力应变的演变规律。最后对C-ECAP制备的铜包铝金属进行了450℃退火1 h的处理。结果表明:C-ECAP挤压过程中温升集中在剪切作用区,最大温升达91.7℃;变形温度为金属流动速度提供有利条件,最高速度为94.7 mm/s;经过剪切作用的坯料,晶粒显著细化,截面质量良好,形成紧密的机械结合,退火处理后形成2.5μm的原子结合层,主要成分为CuAl_(2)。C-ECAP结合退火处理后铜包铝金属材料性能优异,结合面强度为33 MPa,整体强度为165 MPa,铜、铝金属的硬度分别为52和27 HV0.1。C-ECAP结合退火处理可实现一种高强度、结合性能良好的铜包铝金属线材的制备。Copper-clad aluminum metal materials were prepared using continuous equal channel angular pressing(C-ECAP)technology.The influence of shear action on bonding mode and properties of the copper-clad aluminum metal during the C-ECAP was simulated using DEFORM-3D software.The plastic deformation mechanism of bimetallic structures was explored,and the evolution laws of temperature field,velocity field,and stress-strain during the deformation were studied.Finally,the copper-clad aluminum metal prepared by C-ECAP was annealed at 450℃for 1 h.The results show that the temperature rise during the C-ECAP extrusion is concentrated in the shear zone,with a maximum temperature rise of 91.7℃.The deformation temperature provides favorable conditions for the metal flow velocity,with a maximum velocity of 94.7 mm/s.After shearing,the grains of the billet are significantly refined,the cross-sectional quality is good,and a tight mechanical bond is formed.After annealing,a 2.5μm atomic bonding layer is formed,mainly composed of CuAl_(2).The C-ECAP combined with annealing treatment results in excellent performance of the copper-clad aluminum metal materials,with a bonding surface strength of 33 MPa and an overall strength of 165 MPa,and the hardness of copper and aluminum metals is 52 HV0.1 and 27 HV0.1,respectively.The C-ECAP combined with annealing treatment can achieve the preparation of high-strength and well bonded copper-clad aluminum metal wire.

关 键 词：铜包铝金属 C-ECAP 剪切变形 结合性能 数值模拟 

分 类 号：TG379[金属学及工艺—金属压力加工]