Cu/CuCrZr钎焊用Cu-Mn基多元固溶体钎料和接头结构

doi:10.16568/j.0254-6086.202302001

核聚变与等离子体物理 ›› 2023, Vol. 43 ›› Issue (2): 125-131.DOI: 10.16568/j.0254-6086.202302001

• 核聚变工程 • 下一篇

Cu/CuCrZr钎焊用Cu-Mn基多元固溶体钎料和接头结构

徐日升1 ，朱颉1 ，郭锋1 ，魏明玉1 ，羌建兵1 ，王英敏1 ，王建豹2 ，练友运2 ，封范2 ，刘翔2

(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)

收稿日期:2021-04-30 修回日期:2022-10-12 出版日期:2023-06-15 发布日期:2023-06-09
作者简介:徐日升(1996-)，男，山东日照人，硕士研究生，从事磁约束核聚变热沉材料研究方向。
基金资助:
国家磁约束聚变能发展研究专项(2019YFE03120004)；国家自然科学基金(51671045)

Cu-Mn based solid solution brazing alloys for Cu and CuCrZr brazing and the joint structures

XU Ri-sheng1 , ZHU Jie1 , GUO Feng1 , WEI Ming-yu1 , QIANG Jian-bing1 , WANG Ying-min1 , WANG Jian-bao2 , LIAN You-yun2 , FENG Fan2 , LIU Xiang2

(1. Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), Dalian University of Technology, Dalian 116024; 2. Southwestern Institute of Physics, Chengdu 610041)

Received:2021-04-30 Revised:2022-10-12 Online:2023-06-15 Published:2023-06-09

摘要/Abstract

摘要： 为了解决 CFC 与 CuCrZr 合金的冶金连接问题，以二元合金 Cu₆₂Mn₃₈(at.%)为基础成分，采用低熔点 Ga 作为主要合金化元素和微合金化元素 Cr 和 Si，设计了系列固溶体钎料合金 Cu₆₂Mn_37-xGa_xCr_0.5Si_0.5(x=0~10， at.%)。利用电弧熔炼、铜模吸铸和冷轧制备了 100μm 厚的钎料箔带。采用 Cu62Mn31Ga6Cr0.5Si0.5 钎料在不同工艺条件下(875~900℃，保温 15~25min)制备了无氧铜和 CuCrZr 合金钎焊接头。通过热分析和 X-射线衍射分析了钎料熔化行为和相组成；采用光学显微镜、扫描电镜、电子探针和力学性能拉伸机对接头的组织形貌、成分分布和力学性能进行了分析。结果表明，在 880℃/保温 25min 钎焊工艺下可获得无缺陷 CFC/CuCrZr 接头结构，焊缝的 Cu 固溶体基体内有少量不连续分布的粒状纳米 Cr₃Si 析出相；在室温抗拉试验中，此接头的抗拉强度为 215MPa，断后延伸率 40%，断裂模式为韧性断裂。该钎料和焊接工艺已应用于 HL-2M 偏滤器制造中碳纤维复合材料和 CuCrZr 合金的连接加工。

关键词: Cu/CuCrZr 钎焊, Cu-Mn 基钎料, 接头组织与性能, 偏滤器

Abstract: In order to solve the metallurgical connection problem between CFC and CuCrZr alloy, a series of solid solution brazing alloys with the nominal compositions of Cu₆₂Mn_37-xGaxCr_0.5Si_0.5(x=0~10, at.%) were designed by taking Cu₆₂Mn₃₈(at.%) as the basic composition, Ga with a low melting point as the major alloying element and Cr and Si the minor alloying elements. The brazing alloys in foil form of 100μm thick were made by arc melting, suction casting and subsequent cold rolling. The brazing alloy of Cu₆₂Mn₃₁Ga₆Cr_0.5Si_0.5 was employed to joint oxygen-free copper (OFC) and CuCrZr alloy at different brazing temperatures of 875~900℃ and holding times of 15~25min. The melting behavior of the brazing alloys was examined by thermal analysis, and their structures were identified by X-ray diffraction. The microstructure, composition and mechanical properties of joints were studied by means of optical microscopy, scanning electron microscopy, electron probe and mechanical properties tensile equipment, respectively. The results show that defect-free OFC/CuCrZr joints were obtained at a brazing temperature of 880℃ along with a holding time of 25min. The main bonding seam of the joints consists of a Cu solid solution matrix, in which small amount of nano Cr₃Si particles are unevenly and discontinuously embedded. In room temperature tensile test, the OFC/CuCrZr joint exhibited an tensile strength of 215MPa，a plastic strain of ~40%, and a tough fracture mode. The Cu₆₂Mn₃₁Ga₆Cr_0.5Si_0.5 brazing material associated with the specific brazing technique has been used to joint the carbon fiber composite and CuCrZr alloy in the fabrication of HL-2M divertor.

Key words: Cu/CuCrZr brazing, Cu-Mn based brazing alloys, Joint structure and performance, Divertor

中图分类号:

TG425.2

徐日升, 朱颉, 郭锋, 魏明玉, 羌建兵, 王英敏, 王建豹, 练友运, 封范, 刘翔. Cu/CuCrZr钎焊用Cu-Mn基多元固溶体钎料和接头结构[J]. 核聚变与等离子体物理, 2023, 43(2): 125-131.

XU Ri-sheng , ZHU Jie , GUO Feng , WEI Ming-yu , QIANG Jian-bing , WANG Ying-min , WANG Jian-bao , LIAN You-yun , FENG Fan , LIU Xiang. Cu-Mn based solid solution brazing alloys for Cu and CuCrZr brazing and the joint structures [J]. Nuclear Fusion and Plasma Physics, 2023, 43(2): 125-131.

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Cu/CuCrZr钎焊用Cu-Mn基多元固溶体钎料和接头结构

Cu-Mn based solid solution brazing alloys for Cu and CuCrZr brazing and the joint structures

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