氟化物A-TIG焊接Ti6Al4V的电弧行为  

Arc behavior of fluoride effects in the A-TIG welding of Ti6Al4V

作　　者：高晓刚[1] 董俊慧[1] 韩旭[1] 徐得伟 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051 [2]国家电网黑龙江省送变电工程公司,哈尔滨150000

出　　处：《焊接学报》2017年第10期6-10,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51165027)

摘　　要：试验选用MF型氟盐(Li F,Na F,KF)、MF_2型氟盐(MgF_2,CaF_2,BaF_2)和KN型钾盐(KF,KCl,KBr)对氟化物A-TIG焊接Ti6Al4V的电弧行为进行了研究.结果表明,Li F和KBr活性剂不会影响A-TIG焊电弧行为;KF和CaF_2活性剂会显著收缩电弧,增加电弧温度,但不会影响电弧力;MgF_2活性剂能显著收缩电弧,增加电弧温度,并能增大电弧力;BaF_2活性剂不会影响电弧形态,但能增加电弧温度,减小电弧力;Na F和KCl活性剂可以不同程度地收缩电弧,增加电弧温度,但不会影响电弧力.此外,A-TIG焊接Ti6Al4V应优先选用氟化物作为活性剂,在MF型氟盐中应优先选用KF,在MF_2型氟盐中应优先选用MgF_2.Three types of compounds,fluorides with MF type( including LiF,NaF,KF) and MF_2 type( including MgF_2,CaF_2,BaF_2) and potassium with KN type( including KF,KCl,KBr),were chosen as activated fluxes to evaluate the effect of arc behavior in A-TIG welding of Ti6Al4V. The results showed that Li F and KBr fluxes could not impact arc behavior. KF and CaF_2 fluxes could contract the arc and increase the arc temperature,but showed no effects on the arc force. MgF_2 flux could contract the arc,increase the arc temperature and arc force.BaF_2 flux could increase the arc temperature and reduce the arc force,but showed no effects on the arc shape. Na F and KCl could contract the arc in different levels,and increase the arc temperature,but showed no effects on the arc force. In addition,further research suggested that fluoride fluxes should be the first choice in A-TIG welding of Ti6Al4 V. In MF type fluorides,KF should be selected as activated flux,and in MF_2 type,MgF_2 should be selected.

关 键 词：A-TIG焊 TI6AL4V钛合金 电弧行为 

分 类 号：TG444[金属学及工艺—焊接]