工程科学学报，第40卷，第11期：1358-1372,2018年11月 Chinese Journal of Engineering,Vol.40,No.11:1358-1372,November 2018 DOI:10.13374/j.issn2095-9389.2018.11.010;http://journals.ustb.edu.cn 铜包铝丝材的旋锻复合-拉拔成形与组织性能 娄敏轩)，刘新华)区，姜雁斌”，谢建新”，谢明) 1)北京科技大学新材料技术研究院，北京1000832)贵研铂业股份有限公司，昆明650106 ☒通信作者，E-mail:Liuxinhual8@l63.com 摘要采用“热旋锻-拉拔”方法制备了直径为65μm、包覆铜层厚度较均匀、表面质量高和界面结合质量良好的铜包铝复 合微丝，研究了合理热旋制度、热旋复合成形铜包铝线材的组织和界面结合状态以及中间退火和拉拔对线材组织与性能的影 响.结果表明：合理的旋锻制度为旋锻温度350℃，单道次变形量40%，旋锻后形成了动态再结品组织和厚度为0.7m的界 面扩散层.复合线材的合理退火工艺参数为350℃/30min(退火温度350℃、退火时间30min),该条件下退火后线材延伸率达 到最高值35.7%，界面扩散层厚度约为2.1m,退火后铜层和铝芯发生再结晶，组织内部形成等轴晶组织.当退火温度超过 350℃时，铜层和铝芯品粒长大，界面扩散层厚度增加，从而导致线材的延伸率下降.将单道次变形量控制在15%~20%，经 过粗拉，制备了0.96m的丝材：粗拉后不进行退火处理，将单道次变形量控制在8%~15%，经过细拉，制备了表面光洁、直 径为65μm的复合微丝.在拉拔过程中，铜层和铝芯均出现(111)丝织构. 关键词铜包铝：复合丝材：旋锻：拉拔：组织性能 分类号TG356.47 Rotary swaging-drawing formation,microstructure,and properties of copper-clad alu- minum composite micro-wires LOU Min-xuan,LIU Xin-hua,JlANG Yan-bin,XIE Jian-xin'),XIE Ming?) 1)Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China 2)Sino-platinum Metals Co.,Ltd,Kunming 650106,China Corresponding author,E-mail:Liuxinhual8@163.com ABSTRACT Copper-clad aluminum wires are extensively applied in aerospace,telecommunications,national defense industry,and other fields,because of the combined advantages of the excellent conductivity,thermal conductivity,and low contact resistance of copper and the low density,corrosion resistance,and low costs of aluminum.In this study,a composite wire with high interfacial bond- ing quality was obtained by hot rotary swaging,which can be utilized in manufacturing to achieve high efficiency and high quality because of its feature of the large single-pass deformation.The processed wire was then prepared by drawing into micro-wires,and given this,a simple,inexpensive,and highly efficient method for preparing micro-wires was developed in this study.Copper-clad aluminum wires with a diameter of 65 um,uniformly thick coating,glossy surface,and good interfacial bonding were prepared by the hot rotary swaging-drawing method.The rotary swaging parameters and the microstructure and interfacial bonding of the composite wire were studied,and the effects of drawing and intermediate annealing on its microstructure and properties were discussed.The results show that the reasonable swaging parameters are 350 C swaging temperature with 40%single-pass deformation.After the rotary swaging,dynamic recrystallization microstructures and interface diffusion layer with thickness of 0.7 um are formed.The optimum annealing parameter is 350 C/30 min (350 annealing temperature with 30 min annealing time),under which the elongation reaches 35.7%,the thickness of interface diffusion layer is 2.I um,and the copper layer and the aluminum core are recrystallized with the 收稿日期：2017-11-12 基金项目：国家高技术研究与发展计划资助项目(2013AA030706):云南省科技合作资助项目(20151B012):国家留学基金资助项目(201506465055)工程科学学报,第 40 卷,第 11 期:1358鄄鄄1372,2018 年 11 月 Chinese Journal of Engineering, Vol. 40, No. 11: 1358鄄鄄1372, November 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 11. 010; http: / / journals. ustb. edu. cn 铜包铝丝材的旋锻复合鄄鄄拉拔成形与组织性能 娄敏轩1) , 刘新华1)苣 , 姜雁斌1) , 谢建新1) , 谢 明2) 1) 北京科技大学新材料技术研究院, 北京 100083 2) 贵研铂业股份有限公司, 昆明 650106 苣 通信作者, E鄄mail: Liuxinhua18@ 163. com 摘 要 采用“热旋锻鄄鄄拉拔冶方法制备了直径为 准65 滋m、包覆铜层厚度较均匀、表面质量高和界面结合质量良好的铜包铝复 合微丝,研究了合理热旋制度、热旋复合成形铜包铝线材的组织和界面结合状态以及中间退火和拉拔对线材组织与性能的影 响. 结果表明:合理的旋锻制度为旋锻温度 350 益 ,单道次变形量 40% ,旋锻后形成了动态再结晶组织和厚度为 0郾 7 滋m 的界 面扩散层. 复合线材的合理退火工艺参数为 350 益 / 30 min(退火温度 350 益 、退火时间 30 min),该条件下退火后线材延伸率达 到最高值 35郾 7% ,界面扩散层厚度约为 2郾 1 滋m,退火后铜层和铝芯发生再结晶,组织内部形成等轴晶组织. 当退火温度超过 350 益时,铜层和铝芯晶粒长大,界面扩散层厚度增加,从而导致线材的延伸率下降. 将单道次变形量控制在 15% ~ 20% ,经 过粗拉,制备了 准0郾 96 mm 的丝材;粗拉后不进行退火处理,将单道次变形量控制在 8% ~ 15% ,经过细拉,制备了表面光洁、直 径为 准65 滋m 的复合微丝. 在拉拔过程中,铜层和铝芯均出现掖111业丝织构. 关键词 铜包铝; 复合丝材; 旋锻; 拉拔; 组织性能 分类号 TG356郾 4 + 7 收稿日期: 2017鄄鄄11鄄鄄12 基金项目: 国家高技术研究与发展计划资助项目(2013AA030706); 云南省科技合作资助项目(2015IB012); 国家留学基金资助项目(201506465055) Rotary swaging鄄drawing formation, microstructure, and properties of copper鄄clad alu鄄 minum composite micro鄄wires LOU Min鄄xuan 1) , LIU Xin鄄hua 1) , JIANG Yan鄄bin 1) , XIE Jian鄄xin 1) , XIE Ming 2) 1) Institute for Advanced Materials and Technology, University of Science and Technology Beijing,Beijing 100083, China 2) Sino鄄platinum Metals Co. , Ltd, Kunming 650106, China 苣 Corresponding author, E鄄mail: Liuxinhua18@ 163. com ABSTRACT Copper鄄clad aluminum wires are extensively applied in aerospace, telecommunications, national defense industry, and other fields, because of the combined advantages of the excellent conductivity, thermal conductivity, and low contact resistance of copper and the low density, corrosion resistance, and low costs of aluminum. In this study, a composite wire with high interfacial bond鄄 ing quality was obtained by hot rotary swaging, which can be utilized in manufacturing to achieve high efficiency and high quality because of its feature of the large single鄄pass deformation. The processed wire was then prepared by drawing into micro鄄wires, and given this, a simple, inexpensive, and highly efficient method for preparing micro鄄wires was developed in this study. Copper鄄clad aluminum wires with a diameter of 准65 滋m, uniformly thick coating, glossy surface, and good interfacial bonding were prepared by the hot rotary swaging鄄drawing method. The rotary swaging parameters and the microstructure and interfacial bonding of the composite wire were studied, and the effects of drawing and intermediate annealing on its microstructure and properties were discussed. The results show that the reasonable swaging parameters are 350 益 swaging temperature with 40% single鄄pass deformation. After the rotary swaging, dynamic recrystallization microstructures and interface diffusion layer with thickness of 0郾 7 滋m are formed. The optimum annealing parameter is 350 益 / 30 min (350 益 annealing temperature with 30 min annealing time), under which the elongation reaches 35郾 7% , the thickness of interface diffusion layer is 2郾 1 滋m, and the copper layer and the aluminum core are recrystallized with the