镀锌汽车板点焊电极的优化技术  

Optimization techniques of spot-welding electrode applied to zinc coated steel used in auto

作　　者：王威[1] 张永强[1] 刘兴全[1] 贾松青[1] 章军[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《电焊机》2013年第12期68-72,共5页Electric Welding Machine

摘　　要：为提高镀锌汽车板点焊电极使用寿命,对普通铬锆铜电极进行-130℃的深冷处理,通过对比深冷前后电极端面的微观形貌、深冷处理前后点焊电极在焊接过程中磨损情况以及焊接500点后普通电极与深冷电极端面形貌及成分分析,探讨深冷处理对点焊电极的优化机理。研究表明:深冷处理使电极内部微观结构发生了一系列变化,改善了电极的热物理性能和力学性能,显著提高了镀锌钢板点焊电极的寿命。The cryogenic Cr-Zr-Cu electrode which was used for galvanized sheet welding was treated at-130 ℃,in order to prolong the service life of electrode.For the treated and untreated electrode, the paper comparative the electrode microstructure before welding,wear and tear during the welding process,composition and microstructure after 500 spots welding.The result showed that cryogenic treatment change the electrode microstructure,enhanced thermophysical parameters,conductivity and mechanical property and then prolong the service life of electrode.

关 键 词：镀锌板 点焊电极 深冷处理 电极寿命 

分 类 号：TG438.2[金属学及工艺—焊接]