王若旭,何源,谭腾,郭学鹏,宋健,任军帅,张生虎,张兴义.爆炸焊接制备超导射频腔的铌-316L不锈钢过渡接头[J].稀有金属材料与工程,2019,48(12):3876~3882.[Wang Ruoxu,He Yuan,Tan Teng,Guo Xuepeng,Song Jian,Ren Junshuai,Zhang Shenghu,Zhang Xingyi.Niobium-316L Stainless Steel Transition Joints for Superconducting Radiofrequency Cavities by Explosive Welding[J].Rare Metal Materials and Engineering,2019,48(12):3876~3882.]
爆炸焊接制备超导射频腔的铌-316L不锈钢过渡接头
投稿时间:2018-11-08  修订日期:2018-12-12
中文关键词:  爆炸焊接    不锈钢  过渡接头  液氦
基金项目:中国科学院重大资助项目,国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      Nb/316L不锈钢过渡接头的研究可以为改进超导射频腔氦夹克的材料带来新的突破。本文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。我们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环境,同时还观察到在液氮环境下复合材料有分层现象出现。最后我们进行了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。
Niobium-316L Stainless Steel Transition Joints for Superconducting Radiofrequency Cavities by Explosive Welding
英文关键词:Explosive welding  Niobium  Stainless steel  Transition joint  Liquid helium
英文摘要:
      The study of the manufacture of niobium/316L stainless steel transition joints can lead to a new breakthrough in improving the material for the helium vessel of the superconducting radio frequency cavities. In this study, 316L stainless steel and niobium composite plates were fabricated 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 demonstrated that no brittle intermetallic layer was formed and no diffusion phenomenon was observed after heat treatment processes. Mechanical tests including tensile tests, shear tests and bending tests were conducting both at room temperature and cryogenic temperature. At low temperature, the composite plates held higher strength than at the room temperature. In cryogenic tensile tests, we observed that the Niobium section of the composite plate broke in layers when the sample reached yielding strength. Beside the raw material, transition joints with Nb-SS adapters were designed and fabricated. The leak check showed the joints’ leak rates meet project requirements and indicated explosively bonded Nb-SS is viable way to fabricate stainless steel helium vessel for SRF cavities.
作者单位E-mail
王若旭 近代物理研究所 wangruoxu@impcas.ac.cn 
何源 近代物理研究所  
谭腾 近代物理研究所  
郭学鹏 西北有色金属研究院  
宋健 西北有色金属研究院  
任军帅 西北有色金属研究院  
张生虎 近代物理研究所  
张兴义   
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