变压器内壳屏蔽层用紫铜板焊接工艺研究  

Study on Welding Process of Copper Plate for Transformer Inner Shell Shielding Layer

作　　者：李继红[1] 张云龙 杜明科 张敏[1] 雷龙宇 LI Jihong;ZHANG Yunlong;DU Mingke;ZHANG Min;LEI Longyu(School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《焊管》2021年第10期7-12,共6页Welded Pipe and Tube

基　　金：国家自然科学基金“低合金钢/镍基合金层状复合材料熔覆层微观组织演变及相调控”(项目编号51974243);西安市科技计划项目“钛/管线钢层状复合板过渡层焊接材料的研究及匹配焊材开发”(项目编号201805037YD15CG21(16))。

摘　　要：为了研究保护气体和预热温度对紫铜焊接质量的影响,对5 mm厚的T2-Y紫铜采用熔化极气体保护焊进行焊接试验,并分析其焊接接头微观组织和力学性能。结果表明,焊缝中心处为粗大的柱状晶形貌,而热影响区为典型的孪晶组织,每组焊接工艺下焊接接头的抗拉强度均能满足工程使用要求;不进行焊前预热、采用保护气体为70%Ar+30%He制备的焊接接头适合在100℃条件下服役;预热400℃、采用保护气体为70%Ar+30%He制备的焊接接头冲击功最高。In order to study the effects of protective gas and preheating temperature on the welding quality of red copper,the welding test of T2-Y red copper with 5 mm thickness was carried out by gas metal arc welding,and the microstructure and mechanical properties of the welded joint were analyzed.The results show that the center of the weld is coarse columnar crystal,and the heat affected zone is typical twin structure.The tensile strength of the welded joint under each welding process can meet the engineering requirements.The welded joint prepared without preheating before welding and with protective gas of 70%Ar+30% He is suitable for service at 100℃.The impact energy of welded joint prepared by preheating 400℃ and protective gas of 70% Ar+30% He is the highest.

关 键 词：T2-Y紫铜 预热温度 保护气体 微观组织 力学性能 

分 类 号：TG444.72[金属学及工艺—焊接]