单电源交流双钨极氩弧焊接铝合金工艺机理分析

发布时间：2018-04-20 16:31

本文选题：铝合金 + 单电源双钨极氩弧焊　；参考：《焊接学报》2015年02期

【摘要】：以6061铝合金为研究对象,进行单电源交流双钨极氩弧焊接工艺试验.采用金相显微镜、CCD摄像头、电流检测系统对焊接接头的组织、电弧形态以及电流变化过程进行观察与检测分析.结果表明,大电流下双钨极可获得均匀美观的铝合金焊缝成形,但钨极串行优于钨极并行.电弧电流检测显示焊接过程中流经两个TIG焊枪的电流大小呈现非均匀分配形式,单电源单钨极电流密度沿着焊接方向呈现单峰分布而双钨极非单峰分布.在电弧作用区域双钨极耦合电弧的电流密度值要小于单钨极.另外双钨极能扩展耦合电弧的弧根,增加熔池受热面积,在保证焊缝成形的同时提高焊接效率.
[Abstract]:Taking 6061 aluminum alloy as the research object, the welding process of single source AC double tungsten arc welding was carried out. The microstructure, arc shape and current variation process of welded joints were observed and analyzed by using a CCD camera with a metallographic microscope and a current detection system. The results show that uniform and beautiful weld formation of aluminum alloy can be obtained by double tungsten electrode at high current, but the serial tungsten electrode is superior to tungsten electrode in parallel. The arc current measurement shows that the current size of the two TIG welding torch is distributed inhomogeneously in the welding process, and the current density of the single tungsten electrode in the single power source shows a single peak distribution along the welding direction, and the distribution of the double tungsten electrode is not a single peak in the welding direction. The current density of double tungsten coupled arc is smaller than that of single tungsten electrode. In addition, the double tungsten electrode can expand the arc root of the coupling arc, increase the heated area of the weld pool, and improve the welding efficiency while ensuring the weld forming.
【作者单位】：哈尔滨工程大学水下机器人技术重点实验室;哈尔滨工业大学先进焊接与连接国家重点实验室;
【基金】：国家自然科学基金资助项目(51005049) 哈尔滨市高新技术产业专项资金资助项目(ZX2012ZC006015)
【分类号】：TG444.74

【参考文献】