高速列车铜合金管路密封连接绿色感应钎焊技术研究  

Research on Induction Brazing Technology of Integrated Composite Brazing Metal for Copper Alloy Pipeline of High-speed Train

作　　者：刘勇 裴夤崟 梁赛 姜春鹏 李刚卿 韩晓辉 LIU Yong;PEI Yinying;LIANG Sai;JIANG Chunpeng;LI Gangqing;HAN Xiaohui(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]郑州机械研究所有限公司,河南郑州450001

出　　处：《电焊机》2024年第9期63-68,共6页Electric Welding Machine

摘　　要：为解决传统火焰钎焊和高温银钎料存在的质量问题、环境污染、安全风险、成本高昂等问题,研究了一种适用于高速列车铜合金管路密封连接的绿色钎焊技术。采用低银复合钎料BAg34CuZnSn复合钎料和感应钎焊技术,对TP2Y2紫铜管套接接头进行钎焊连接,通过OM、SEM、EDS及拉伸试验等分析测试方法,分析了复合钎料感应钎焊紫铜管钎缝形貌、钎料填充深度、钎焊接头界面组织、力学性能以及钎焊热循环对紫铜管组织性能的影响。结果表明,在输出功率40 kW、钎焊电流100A和钎焊时间40 s的条件下,钎料能够完全有效填缝,实现TP2Y2紫铜管套接接头的密封和高强连接,钎缝外观光滑、连续,母材无凹陷性熔蚀。钎缝组织主要由Ag固溶体和Cu固溶体组成,钎缝组织连续致密,无气孔、裂纹等缺陷。紫铜管钎焊接头的平均抗剪强度达到222.7 MPa,能够满足大熔深铜管结构的可靠连接。This article uses BAg34CuZnSn composite brazing material and induction brazing technology to braze the TP2Y2 copper pipe sleeve joint.Through analysis and testing methods such as OM,SEM,EDS,and tensile tests,the morphology of the composite brazing joint,the filling depth of the brazing material,the interface structure of the brazing joint,and the mechanical properties of the brazing joint were studied.The influence of brazing thermal cycle on the microstructure and properties of the copper pipe was analyzed.The results show that using output power(40 kW),brazing current(100 A),and brazing time(40 s)can ensure that the brazing material was completely and effectively filled,achieving sealed high-strength connection of TP2Y2 copper pipe sleeve joint.The appearance of the brazing joint is smooth and continuous,and the base material has no concave melting corrosion.The brazing seam mainly consists of Ag solid solution and Cu solid solution,and the microstructure of the brazing seam is continuous and dense,without defects such as pores and cracks.The brazed joint of purple copper tube has an average shear strength of 222.7 MPa,which can meet the reliable connection of large penetration copper tube structures.

关 键 词：紫铜管 感应钎焊 微观组织 剪切性能 绿色制造 

分 类 号：TG454[金属学及工艺—焊接]