镁与镀锌钢板脉冲旁路耦合电弧熔钎焊  

Pulsed DE-GMA welding brazing between magnesium and galvanized steel

作　　者：黄健康[1] 邵玲[2] 石玗[1] 顾玉芬[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050

出　　处：《焊接学报》2013年第8期9-12,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51165023);兰州理工大学优秀青年教师培养计划

摘　　要：采用脉冲旁路耦合电弧熔钎焊,使用AZ92A镁合金焊丝在镀锌钢板上进行平板堆焊试验,通过调整焊接工艺参数,能在最佳的焊接参数下得到熔宽均匀,成形良好的焊缝.通过SEM,EDS,EPMA等测试手段对焊接接头界面中心区的微观组织进行观察与分析,及对焊缝的剥落面进行XRD测试发现有Mg17Al12,Mg0.97Zn0.03和Fe4Zn9金属间化合物形成.结果表明,在适当参数下,利用脉冲旁路耦合电弧熔钎焊可获得镁与镀锌钢板的焊缝,且镁与镀锌钢板异种金属电弧熔钎焊时镁和铁都与锌反应形成了金属间化合物.Bead welding was made with AZ92A magnesium alloy wire on galvanized steel plate by pulsed DE-GMAW.By adjusting the welding parameters,homogeneous fusion width and good morphology of welded seam were obtained under the optimized welding parameters.The microstructure in the interface center of the joint was observed and analyzed by SEM,EDS and EPMA.And Mg17Al12,Mg0.97Zn0.03 and Fe4Zn9 intermetallic compounds were detected on stripped surfaces using XRD.The results show that under appropriate parameters,welding-brazing of magnesium/galvanized steel dissimilar metals were achieved by pulsed DE-GMAW.And Mg and Fe elements reacted with Zn to form intermetallic compounds during welding-brazing of magnesium alloy to galvanized steel.

关 键 词：脉冲旁路耦合电弧 GMAW熔钎焊 镁与镀锌钢板焊接 金属间化合物 

分 类 号：TG434[金属学及工艺—焊接]