HPVP-GTAW电弧力及焊接质量分析  

Analysis of arc pressure and its weld quality in hybrid ultrahigh frequency pulse VP-GTAW process

作　　者：从保强[1] 齐铂金[1] 杨明轩[1] 李伟[1,2] 王乐笑[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京石油化工学院电气工程系,北京102617

出　　处：《焊接学报》2013年第1期21-24,114,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50975015;51005011)

摘　　要：分别以3种不同材质铝合金平板材料为试验对象,研究分析了复合超高频脉冲方波变极性钨极氩弧焊接(HPVP-GTAW)过程中电弧力的变化及其对焊缝成形特征和接头力学性能的影响.结果表明,与常规变极性氩弧焊工艺相比,脉冲方波电流的加入使得HPVP-GTAW电弧力显著增加,同时焊缝熔透率大幅提高,接头力学性能得到明显改善和提高;保持脉冲电流幅值和占空比基本不变,在10～80 kHz范围内,脉冲电流频率对焊接过程产生了重要影响,频率为40 kHz时,HPVP-GTAW电弧力和焊缝熔透率均达到最大,分别约为常规变极性焊接电弧的1.9倍和1.7倍.The variations of arc pressure and weld characteristics in the welding of 2219,2A14 and 5A06 aluminum alloys were investigated based on the hybrid ultrahigh frequency pulse current variable polarity gas tungsten arc welding(HPVP-GTAW) process.The experimental results show that compared with the conventional VP-GTAW(variable polarity gas tungsten arc welding) process,arc pressure and weld penetration expressed by the ratio of weld depth to width are enhanced predominantly with the effect of high frequency pulse current.Mechanical properties of welded joints are improved obviously.At the given pulse current amplitude and pulse duty cycle,the welding process is influenced significantly by the pulse current frequency in the range of 10 kHz to 80 kHz.At the given pulse frequency of 40 kHz,arc pressure and weld penetration of welded joints increased by about 90% and 70%,respectively,compared with that of welded joints with no effect of pulse current.

关 键 词：超高频脉冲电流 变极性钨极氩弧焊 电弧力 焊接质量 

分 类 号：TG457.14[金属学及工艺—焊接]