水下湿法药芯焊丝焊接电弧稳定性  

Arc stability of underwater wet flux-cored arc welding

作　　者：石永华[1] 郑泽培[1] 黄晋[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《焊接学报》2012年第10期49-53,115,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51175185;50705030);中央高校基本科研业务费专项资金资助项目(2012ZZ0052);广东省自然科学基金资助项目(9151064101000065)

摘　　要：利用焊接电弧电压信号的标准差和差异系数的倒数作为评价电弧稳定性的指标,通过试验研究了不同工艺条件下水下湿法药芯焊丝焊接的电弧稳定性.建立了湿法焊接电弧稳定性的敏感度模型,分析了各工艺参数如焊接电流、电弧电压、焊接速度和水深对湿法药芯焊丝焊接电弧稳定性的影响.结果表明,水深增大时,焊接电弧稳定性变差,特别是在浅水区域,增大水深可显著降低电弧稳定性;焊接速度增大,电弧稳定性变差;焊接电压对电弧稳定性影响很大,适当提高焊接电压可提高电弧的稳定性.Standard deviation(SD) and the reciprocal of coefficient of variation(CV) of welding voltage are used as the index of arc stability.The arc stability of underwater wet flux-cored arc welding in different welding conditions was studied based on underwater wet welding experiments.Sensitivity models of arc stability have been built and sensitivities of welding parameters on arc stability,such as welding current,voltage,speed and water depth,were analyzed.The results showed that the arc stability got worse as water depth increased.Especially in shallow water,the arc stability decreased dramatically as the water depth increased.Arc stability also decreases with the increasing of welding speed.The welding voltage has a great influence on arc stability and increasing the welding voltage appropriately will improve the arc stability.

关 键 词：水下焊接 电弧稳定性 敏感度分析 

分 类 号：TG403[金属学及工艺—焊接]