工程科学学报，第41卷，第5期：633-645,2019年5月 Chinese Journal of Engineering,Vol.41,No.5:633-645,May 2019 DOI:10.13374/j.issn2095-9389.2019.05.010;http://journals.ustb.edu.cn 银包铝棒材立式连铸复合成形制备工艺 施兵兵)，刘新华12)，谢建新12)，谢明) 1)北京科技大学新材料技术研究院，北京1000832)北京科技大学先进材料制备技术教有部重点实验室，北京100083 3)贵研铂业股份有限公司，昆明650106 ☒通信作者，E-mail:liuxinhua@usth.edu.cn 摘要以直径20m,包覆比50%的银包铝细棒为研究对象，通过有限元数值模拟以及相应的实验验证，得出了银包铝复合 材料立式连铸复合成形工艺的边界条件.采用ProCAST软件模拟了立式连铸成形过程，得出各工艺参数对连铸结果的影响规 律，给出了可行的连铸工艺参数范围及工艺调控策略，以模拟结果为指导，制备出表面质量高、复合界面效果良好的银包铝复 合棒材.实验结果表明，芯管长度、连铸速度对结果的影响最大，芯管长度影响了芯管出口处双金属的接触温度、接触时间，并 直接改变了铝芯固液界面的相对位置.当芯管长度过短时，银铝界面反应较强烈，当芯管长度过长时，芯棒冷却强度大，芯部 铝产生明显的冷隔。随着连铸速度的增大，银的固液界面到芯管出口距离逐渐减小，铝的固液界面距出口距离逐渐增大：铝液 铸造温度升高，冷却水减少也会带来相似的作用.结果显示，芯管长度30mm,速度37-67mm·min1,银的铸造温度1225~ 1325℃，铝的铸造温度800℃，冷却水流量约300L·h1是可行的银包铝连铸工艺. 关键词复合材料：银包铝：连铸复合：数值模拟：制备 分类号TG244.3 Preparation process of silver clad aluminum bars by vertical continuous casting composite forming SHI Bing-bing,LIU Xin-hua2,XIE Jian-xin'2),XIE Ming) 1)Institute for Advanced Materials and Technology,University of Science and Technology Beijing.Beijing 100083,China 2)Key Laboratory for Advanced Materials Processing Ministry of Education),University of Science and Technology Beijing,Beijing 100083,China 3)Sino-platinum Metals Co.,Ltd.,Kunming 650106,China XCorresponding author,E-mail:liuxinhua@ustb.edu.cn ABSTRACT Silver clad aluminum composite wire,which combines the high electrical conductivity of silver-coated metal,good welding performance,and low density,has wide application prospects in aerospace and other fields.The preparation of silver clad alu- minum bars with high surface quality and good combination of interfaces is an important step in the preparation of silver clad aluminum wire with excellent performance.Continuous casting composite forming is a short,high-efficiency material-forming process,which pro- vides methods for the preparation of silver clad aluminum.The boundary conditions of the vertical continuous casting process of silver clad aluminum composite rod that has a diameter of 20 mm and cladding ratio of 50%were established through finite element numerical simulation using the ProCAST software and corresponding experiments.The effect of each process parameter on continuous composite casting was analyzed,based on which the optimized control method was obtained.A silver clad aluminum composite rod with high sur- face quality and excellent bonding interface was prepared on the basis of the simulation results.The length of the core tube and the speed of continuous casting are considered to be the most important factors affecting the formation process.The length of the core tube 收稿日期：2018-09-07 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);新金属材料国家重点实验室自主 课题资助项目(2018Z-16)工程科学学报,第 41 卷,第 5 期:633鄄鄄645,2019 年 5 月 Chinese Journal of Engineering, Vol. 41, No. 5: 633鄄鄄645, May 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 05. 010; http: / / journals. ustb. edu. cn 银包铝棒材立式连铸复合成形制备工艺 施兵兵1) , 刘新华1,2)苣 , 谢建新1,2) , 谢 明3) 1) 北京科技大学新材料技术研究院, 北京 100083 2) 北京科技大学先进材料制备技术教育部重点实验室, 北京 100083 3) 贵研铂业股份有限公司, 昆明 650106 苣通信作者, E鄄mail: liuxinhua@ ustb. edu. cn 摘 要 以直径 20 mm,包覆比 50% 的银包铝细棒为研究对象,通过有限元数值模拟以及相应的实验验证,得出了银包铝复合 材料立式连铸复合成形工艺的边界条件. 采用 ProCAST 软件模拟了立式连铸成形过程,得出各工艺参数对连铸结果的影响规 律,给出了可行的连铸工艺参数范围及工艺调控策略,以模拟结果为指导,制备出表面质量高、复合界面效果良好的银包铝复 合棒材. 实验结果表明,芯管长度、连铸速度对结果的影响最大,芯管长度影响了芯管出口处双金属的接触温度、接触时间,并 直接改变了铝芯固液界面的相对位置. 当芯管长度过短时,银铝界面反应较强烈,当芯管长度过长时,芯棒冷却强度大,芯部 铝产生明显的冷隔. 随着连铸速度的增大,银的固液界面到芯管出口距离逐渐减小,铝的固液界面距出口距离逐渐增大;铝液 铸造温度升高,冷却水减少也会带来相似的作用. 结果显示,芯管长度 30 mm,速度 37 ~ 67 mm·min - 1 ,银的铸造温度 1225 ~ 1325 益 ,铝的铸造温度 800 益 ,冷却水流量约 300 L·h - 1是可行的银包铝连铸工艺. 关键词 复合材料; 银包铝; 连铸复合; 数值模拟; 制备 分类号 TG244郾 3 收稿日期: 2018鄄鄄09鄄鄄07 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); 新金属材料国家重点实验室自主 课题资助项目(2018Z鄄16) Preparation process of silver clad aluminum bars by vertical continuous casting composite forming SHI Bing鄄bing 1) , LIU Xin鄄hua 1,2)苣 , XIE Jian鄄xin 1,2) , XIE Ming 3) 1) Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2) Key Laboratory for Advanced Materials Processing (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China 3) Sino鄄platinum Metals Co. , Ltd. , Kunming 650106, China 苣Corresponding author, E鄄mail: liuxinhua@ ustb. edu. cn ABSTRACT Silver clad aluminum composite wire, which combines the high electrical conductivity of silver鄄coated metal, good welding performance, and low density, has wide application prospects in aerospace and other fields. The preparation of silver clad alu鄄 minum bars with high surface quality and good combination of interfaces is an important step in the preparation of silver clad aluminum wire with excellent performance. Continuous casting composite forming is a short, high鄄efficiency material鄄forming process, which pro鄄 vides methods for the preparation of silver clad aluminum. The boundary conditions of the vertical continuous casting process of silver clad aluminum composite rod that has a diameter of 20 mm and cladding ratio of 50% were established through finite element numerical simulation using the ProCAST software and corresponding experiments. The effect of each process parameter on continuous composite casting was analyzed, based on which the optimized control method was obtained. A silver clad aluminum composite rod with high sur鄄 face quality and excellent bonding interface was prepared on the basis of the simulation results. The length of the core tube and the speed of continuous casting are considered to be the most important factors affecting the formation process. The length of the core tube