热处理温度对高纯铌-无氧铜爆炸焊接复合板材组织及性能的影响  

Microstructure and Properties of High-Purity Niobium and Oxygen-Free Copper Explosive Welded Composite Plate with Different Heat Treatment Temperatures

作　　者：苏艳妮 薛少博[1] 王国栋[1] 任军帅 郭学鹏[1] 舒滢[1] Su Yanni;Xue Shaobo;Wang Guodong;Ren Junshuai;Guo Xuepeng;Shu Ying(Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属》2022年第10期1306-1313,共8页Chinese Journal of Rare Metals

基　　金：陕西省重点研发计划工业领域项目(2020GY-301,2021GY-226)资助

摘　　要：采用爆炸焊接方法制备了高纯铌-无氧铜复合板,利用万能试验机、纳米压痕测试仪、扫描电镜(SEM)和电子背散射衍射(EBSD)装置研究了不同热处理温度对复合板材力学性能和结合界面的微观组织的影响。结果表明:爆炸焊接复合成形的高纯铌-无氧铜复合板界面层发生明显的塑性变形,形成了周期性的旋涡区域。漩涡区由边部的非晶带、向内的细小组织和被拉长的扁平晶粒组成。同时,还发生了变形带状机制,产生了柱状晶。热处理后的复合板材延伸率高达50%,抗拉强度约210 MPa,屈服强度约88 MPa,剪切强度约160 MPa,分离强度约180 MPa。加工态的复合板界面的显微硬度随距界面的距离减小而增大,热处理后,界面显微硬度与复合板延伸率成正比。界面断口层呈现多个台阶和分层,铜板侧断口为“河流花样”的解理断裂面,铌板侧断口形貌为典型的塑性断裂韧窝。Radio frequency superconducting technology was a hotspot in the field of accelerator.High gradient and high-quality factor could reduce the construction cost and operation cost of superconducting accelerator,and had always occupied the focus in the field of Radio Frequency superconducting technology.As an important constituent material of superconducting cavity,high-purity niobium and oxygen-free copper composite plate,compared with pure niobium superconducting cavity and niobium copper sputtering superconducting cavity,it improved the cavity stiffness and greatly reduced the cost of superconducting cavity,enhanced the mechanical stability and thermal conductivity of superconducting cavity,and provided favorable help for the continuous and stable operation of superconducting accelerator.High-purity niobium plate and oxygen-free copper plate were used as experimental materials.High-purity niobium plate was mainly prepared by forging,rolling,leveling,vacuum annealing,sanding and other processes,the plate specification wasδ1 mm×600 mm×600 mm(δbeing sheet thickness).Oxygen-free copper plate was mainly prepared by cold rolling,leveling,sanding and other processes,the specification wasδ13 mm×500 mm×500 mm.High-purity niobium and oxygen-free copper composite plate was prepared by horizontal explosive composite method.When the explosive welding was completed,a radial pattern waveform was formed on the surface of the composite plate.The composite plate would be leveled,water cut,sanded and other processes,and ultrasonic flaw would be carried out to ensure that the finished composite plate was entirely composited.High-purity niobium and oxygen-free copper composite plate was sampled by water cutting,and the samples were heat treated respectively to study the effect of heat treatment temperature on the microstructure and properties of the composite plate.The effects of different heat treatment temperatures on the microstructure and properties of composite plates and the microstructure of bonding interface were studie

关 键 词：高纯铌-无氧铜复合板 爆炸焊接 热处理 组织及性能 

分 类 号：TG456.6[金属学及工艺—焊接] TG156