活性剂对焊缝咬边倾向及接头疲劳性能的影响  

Influence of activating flux on undercut and fatigue property of welded joints

作　　者：柴国明[1] 张慧[1] 

机构地区：[1]北京航空制造工程研究所高能柬流加工技术国防科技重点实验室,北京100024

出　　处：《焊接学报》2009年第5期45-48,52,共5页Transactions of The China Welding Institution

基　　金：武器装备重点基金项目(614010);高能束流加工技术国防科技重点实验室基金项目(41318.5.1.9)

摘　　要：针对活性剂等离子弧焊焊接过程,对焊缝咬边倾向和焊接接头的疲劳性能进行了研究.结果表明,增加焊接速度虽然可以提高生产效率,但是焊接速度增加后,熔敷金属不易填充焊趾部,容易在焊趾部产生咬边缺陷,加入活性剂可以减小或消除咬边现象.添加活性剂后,熔敷金属增加,电弧力对熔池的压迫作用增强,电弧电压升高,电弧挺度增加,电弧更稳定.这些因素可以促进熔敷金属向焊趾部流动,填充在焊趾部.添加活性剂后,疲劳寿命最多提高了60%左右.通过添加活性剂可以减小或消除咬边,提高焊接接头的疲劳性能.In activating flux PAW welding,the undercut and fatigue property were studied.The results show that the increase of welding speed can improve the welding efficiency,but the undercut appears.The deposited metal in activating flux PAW welding increases,the arc force strengthens,the arc voltage is higher,the arc stiffness strengthens and the arc is much more stable,which would make the deposited metal flow to the toe zone.The deposited metal would fill up the toe zone.Compared with the specimen without activated flux,the fatigue strength of specimen with activating flux has been increased by 60% at most.The activating flux can make the undercut reduce or vanish and make the fatigue property increase.

关 键 词：活性剂 咬边 疲劳强度 

分 类 号：TG456[金属学及工艺—焊接]