钨/低活化钢钎焊用铁基非晶钎料与接头微结构  

Fe-based amorphous filler alloys for brazing tungsten and low-activation steels and the joint microstructures

作　　者：魏明玉 王建豹 Jitendar Kumar 羌建兵[1] 王英敏[1] 刘天鸷 封范[2] 练友运[2] 刘翔[2] WEI Ming-yu;WANG Jian-bao;Jitendar Kumar;QIANG Jian-bing;WANG Ying-ming;LIU Tian-zhi;FENG Fan;LIAN You-yun;LIU Xiang(Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams(Ministry of Education),Dalian University of Technology,Dalian 116024;Southwestern Institute of physics,Chengdu 610041)

机构地区：[1]大连理工大学三束材料改性教育部重点实验室,大连116024 [2]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2023年第2期132-139,共8页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束聚变能发展研究专项(2019YFE03120004);国家自然科学基金(51671045)。

摘　　要：为了连接W和CLF-1 RAFM钢,设计出由低活化元素组成的Fe-B-Si、Fe-B-Si-Sn、Fe-B-Si-Cr-(Sn)、Fe-B-Si-P-(Cr,Sn)、Fe-B-Si-Mn-(Ga,Sn)和Fe-B-Si-(Cr,Mn,Ga,Ta,Sn)系列Fe基非晶钎料,结合熔体快淬技术制备出非晶合金箔带,并对W/CLF-1 RAFM钢接头微结构进行了对比研究。采用X-射线衍射仪对箔带样品与焊缝进行了相鉴定;通过差热分析测量了非晶箔带的熔化温度和液相线温度;利用光学金相和电子探针分析了焊缝组织形貌和元素分布。结果表明,利用Fe-B-Si、Fe-B-Si-Cr和Fe-B-Si-Mn-Sn非晶钎料可获得结构完整的W/CLF-1钢接头;前两种钎料得到的焊缝组织基体相为α-Fe固溶体,而含Mn钎料形成的焊缝基体为马氏体组织;在高温钎焊过程中,这些Fe基非晶钎料中的高B含量促使FeWB、FeW2B2和Fe3B型金属间化合物在焊缝中形成,并有效地阻止了W元素向低活化钢基体长程扩散。所设计的低活化Fe基非晶钎料可用于W和低活化钢的连接和接头性能研究。For the joining of W and CLF-1 RAFM steel,a series of Fe-based amorphous filler alloys consisting of low-activation constituent elements,namely,Fe-B-Si,Fe-B-Si-Sn,Fe-B-Si-Cr-(Sn),Fe-B-Si-P-(Cr,Sn),Fe-B-Si-Mn-(Ga,Sn) and Fe-B-Si-(Cr,Mn,Ga,Ta,Sn),have been designed and made into amorphous alloys in foil form by means of rapid melt quenching.The microstructures of the W/CLF-1 RAFM steel joints were comparatively studied.X-ray diffraction was performed to identify the phases formed in the foil alloys and in the main bonding seams.The melting temperature and the liquid-phase line temperature of the amorphous foil alloys were examined by differential thermal analysis.The morphology and element mapping for the bonding seams were carried out using optical metallography and electron probe microanalysis respectively.The results show that with the Fe-B-Si,Fe-B-Si-Cr and Fe-B-Si-Mn-Sn amorphous filler alloys,W/CLF-1 joints with perfect structure integrity were fabricated.In the bonding seams,α-Fe solid solution phase is formed as the substrate phase with the first two sorts of filler alloys,and a martensite substrate phase is obtained in the latter case.The high B-content in these Fe-based amorphous alloys impels the FeWB,FeW2B2 and Fe3B types of intermetallic phases to alloying formation in the bonding seams,which effectively blocks the fast diffusion of W to the substrate of low activation steel during high temperature brazing.These new low-activation filler alloys are promising materials for jointing W and RAFMs and for the property assessment of joints.

关 键 词：低活化Fe基非晶钎料 钎焊 W/钢连接 偏滤器 第一壁 

分 类 号：TL627[核科学技术—核技术及应用]