铜镍合金/Cr_(20)Ni_(80)镍铬合金冷压焊接头组织及性能研究  

Study on the Microstructure and Properties of Copper-nickel Alloy/Cr_(20)Ni_(80) Nickel-chromium Alloy Cold-pressed Welding Joint

作　　者：宋红兵 张万鹏[1,2] 祝少华 谢航[1,2] 周超 黄健康[3] SONG Hongbing;ZHANG Wanpeng;ZHU Shaohua;XIE Hang;ZHOU Chao;HUANG Jiankang(China National Petroleum and Natural Gas Pipeline Engineering Technology Research Center Co.,Ltd.,Xi'an 710018,China;China Petroleum Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,China;State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]中油国家石油天然气管材工程技术研究中心有限公司,陕西西安710018 [2]中国石油宝鸡石油钢管有限责任公司,陕西宝鸡721008 [3]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,甘肃兰州730500

出　　处：《电焊机》2025年第2期108-115,共8页Electric Welding Machine

基　　金：国家自然科学基金资助项目(52165045)。

摘　　要：针对非常规石油井下大功率电加热系统核心组件电缆芯线的连接问题,采用冷压焊对铜镍合金/Cr_(20)Ni_(80)镍铬合金异种金属进行焊接,通过对冷压焊接头的力学性能、显微组织、熔合区界面元素扩散、物相进行了分析。结果表明,冷压焊可以实现异种金属的有效连接,拉伸试验表明接头抗拉强度约为570 MPa且断裂在铜镍合金母材侧说明冷压焊接头的抗拉强度大于铜镍合金母材的抗拉强度,弯曲试验表明冷压焊接头在弯曲载荷下承受的最大力为18.9kN,并且弯曲点发生在铜镍合金母材侧说明接头抗弯强度大于铜镍合金母材的抗弯强度,同时通过EDS元素扫描和XRD物相分析证明了在焊缝接头处不存在元素扩散的现象发生。In order to solve the connection problem of the cable core wires of the core components of the high-power electrical application system in unconventional oil Wells,the dissimilar metal Cu-Ni alloy/Cr_(20)Ni_(80)nickel-chromium alloy was welded by cold pressing welding.The mechanical properties,microstructure,interfacial element diffusion and phase of the welding joint were analyzed.The results show that the cold-pressed welding can realize the effective connection of dissimilar metals.Tensile test shows that the tensile strength of the joint is about 570 MPa and the fracture at the side of the copper-nickel alloy base metal indicates that the tensile strength of the cold-pressed welded joint is greater than that of the copper-nickel alloy base metal.Bending test shows that the maximum force of the cold-pressed welded joint under bending load is 18.9 kN.Moreover,the bending point occurs on the side of the copper-nickel alloy base material,indicating that the bending strength of the joint is greater than that of the copper-nickel alloy base material.Meanwhile,EDS element scanning and XRD phase analysis show that there is no element diffusion at the weld joint.

关 键 词：冷压焊 异种金属 显微组织 力学性能 

分 类 号：TG453.4[金属学及工艺—焊接]