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材料导报  2018, Vol. 32 Issue (6): 909-914    https://doi.org/10.11896/j.issn.1005-023X.2018.06.011
  材料研究 |
铜-钢高频感应钎焊工艺及其对接头组织和导电性的影响
石玗, 高海铭, 李广, 李想
兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州 730050
High Frequency Induction Brazing Process of Copper-Steel and Its Effects on Microstructure and Electrical Conductivity of Weld Joint
SHI Yu, GAO Haiming, LI Guang, LI Xiang
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050
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摘要 以解决铜电解永久型阴极板导电杆铜-钢异种金属焊接问题为目标,采用Sn-Cu系钎料在不同钎焊工艺下对T2紫铜和316不锈钢进行铜-钢异种金属高频感应钎焊试验。利用光学显微镜、扫描电镜、能谱仪、X射线衍射仪分析研究了不同工艺参数下形成钎焊接头的微观组织、物相种类及元素分布,同时采用智能金属导体电阻率仪对铜钢焊接试样的导电性进行了检测。结果表明,不同工艺下形成的焊缝界面清晰且无明显的焊接缺陷。钎焊接头主要由铜侧扩散反应层、焊缝中心层、钢侧扩散反应层三部分组成;铜侧扩散反应层呈连续的“锯齿”状分布,主要由金属间化合物Cu6Sn5组成,中心层主要由锡单质、锡的氧化物和少量铜锡金属间化合物Cu6Sn5组成,钢侧扩散反应层生成了少量的铁锡金属间化合物Fe1.3Sn。试样导电率与中心层金属间化合物Cu3Sn的生成量和焊接温度均成反比。通过获得的最佳工艺参数能够得到焊缝成形美观、连接强度优良、导电性能良好的铜-钢钎焊接头。
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石玗
高海铭
李广
李想
关键词:  铜钢异种金属  高频感应钎焊  导电性  组织    
Abstract: Aiming at solving copper-steel dissimilar metal welding problems which happened in the permanent cathode plate conducting rod production,the high-frequency induction brazing experiments of T2 copper and 316 stainless steel were conducted with Sn-Cu solder and they were tested in different processes. Optical microscope,SEM,EDS and X-ray diffraction were used to analyze the microstructure, phase morphology and elemental species of the joints. Meanwhile,intelligent metal conductor resistivity meter was also used to test conductivity of different samples. The results show that the cross-sections formed by different processes are obviously divided into copper diffusion reaction layer, central weld layer, steel diffusion reaction layer and no serious welding defects appear. The copper diffusion reaction layer presents continuous “zigzag”,which is composed of Cu6Sn5. Central weld layer mainly contains tin,tin oxides and Cu6Sn5. A few Fe1.3Sn are generated in the steel diffusion reaction layer. The conductivity of the samples are inversely proportional to the formation of the Cu3Sn and the welding temperature. The parameters can be used to control the welding quality,the connection strength and conductivity of the copper-steel welding joint.
Key words:  copper-steel dissimilar metal    high frequency induction brazing    conductivity    structure
出版日期:  2018-03-25      发布日期:  2018-03-25
ZTFLH:  TG401  
基金资助: 国家自然科学基金(51675256)
引用本文:    
石玗, 高海铭, 李广, 李想. 铜-钢高频感应钎焊工艺及其对接头组织和导电性的影响[J]. 材料导报, 2018, 32(6): 909-914.
SHI Yu, GAO Haiming, LI Guang, LI Xiang. High Frequency Induction Brazing Process of Copper-Steel and Its Effects on Microstructure and Electrical Conductivity of Weld Joint. Materials Reports, 2018, 32(6): 909-914.
链接本文:  
https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.06.011  或          https://www.mater-rep.com/CN/Y2018/V32/I6/909
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