氟化物对自保护药芯焊丝电弧稳定性的影响  

Influences of fluoride compounds on arc stability in self-shielded flux-cored wire welding

作　　者：吴健[1] 刘仁培[1] 汪虎[1] 张伟[1] 史萌 

机构地区：[1]南京航空航天大学材料科学与技术学院,211100 [2]漯河市京漯焊接技术有限公司,462000

出　　处：《焊接》2009年第12期58-62,共5页Welding & Joining

摘　　要：为了改善自保护药芯焊丝的焊接工艺性能,采用了高速摄影、水中收集熔滴、焊接飞溅测试等试验方法,研究了渣系组分中氟化物对自保护药芯焊丝电弧稳定性的影响规律。研究结果表明:随着药芯中CaF_2含量的增加,电弧形态由扩散型转变为集中型,电弧稳定性逐渐恶化;在药芯中用一部分的Na_2SiF_6代替CaF_2,可以提高电弧稳定性,改善工艺性能。综合考虑氟化物对电弧稳定性的影响,药芯中选用CaF_245%～47%,Na_2SiF_6 3%～5%较为合适。In order to improve the processing property of self-shielded flux cored wire,the effects of fluorides on arc stability of self-shielded flux cored wire were investigated by high speed photography,collecting droplets in water through spatter test.The results show that with the increase of CaF_2,arc shape changes from diffusion to concentration and the stability of arc deteriorate.The arc stability and welding processing properties can be improved by replacing a part of CaF_2 with Na_2SiF_6.According to the effect of fluoride on arc stability,the range of CaF_2 45～47%,Na_2SiF63～5%in the flux is preferred.

关 键 词：自保护药芯焊丝 氟化物 电弧稳定性 

分 类 号：TG457.14[金属学及工艺—焊接]