爆炸焊接制备超导射频腔用铌-316L不锈钢过渡接头（英文）  

Niobium-316L Stainless Steel Transition Joints for Superconducting Radiofrequency Cavities by Explosive Welding

作　　者：王若旭 何源[3] 谭腾[3] 郭学鹏 宋健[4] 任军帅 张生虎 张兴义[1,2] Wang Ruoxu;He Yuan;Tan Teng;Guo Xuepeng;Song Jian;Ren Junshuai;Zhang Shenghu;Zhang Xingyi(College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;Key Laboratory of Mechanics on Disaster and Environment in Western China,Ministry of Education,Lanzhou University,Lanzhou 730000,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]兰州大学土木工程与力学学院,甘肃兰州730000 [2]兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州730000 [3]中国科学院近代物理研究所,甘肃兰州730000 [4]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2019年第12期3876-3882,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(11622217);Key Research Project of Frontier Science from Chinese Academy of Sciences(QYZDY-SSW-JSC019);The National Key Project of Scientific Instrument and Equipment Development(11327802)

摘　　要：利用爆炸焊接方式进行了铌和316L不锈钢的连接。为了观察复合材料的性能,对爆炸焊接和热处理后的复合材料进行了结合面微观结构和力学性能研究。微观结构研究表明结合面没有脆性金属间化合物形成且复合材料热处理后没有发现结合面有元素扩散。还对复合材料进行了室温和低温环境下的拉伸测试、剪切测试和弯曲测试。拉伸测试结果表明液氮温度下复合材料的强度高于室温,同时还观察到在液氮环境下复合材料有分层现象出现。最后进行了Nb-316LSS过渡接头的设计、加工和真空检漏,结果表明真空漏率满足工程要求,从而验证了Nb-316LSS复合材料用于SRF超导腔体氦夹克的可行性。316 L stainless steel and niobium composite plates were jointed by explosive welding technique. Microstructure and mechanical properties of the composite plates were investigated both immediately after explosive welding and after heat treatment processes. The investigation of microstructure demonstrates that no brittle intermetallic layer forms and no diffusion phenomenon is observed after heat treatment processes. Mechanical tests including tensile tests, shear tests and bending tests were conducted both at room temperature and cryogenic temperature. At cryogenic temperature, the composite plates hold higher strength than those at the room temperature. In cryogenic tensile tests, we observed that the niobium section of the composite plate breaks in layers when the sample reaches yielding strength. Beside the raw material, transition joints with Nb-SS adapters were designed and fabricated. The leak check shows the joints’ leak rates meet project requirements and indicates explosively bonded Nb-SS is a viable way to fabricate stainless steel helium vessel for SRF cavities.

关 键 词：爆炸焊接 铌 不锈钢 过渡接头 液氦 

分 类 号：TG456.6[金属学及工艺—焊接] TB331[一般工业技术—材料科学与工程]