镁合金活性焊与活性焊丝焊接电弧光谱对比分析  

Comparison of arc spectrum between A-TIG welding and flux coated wire welding for magnesium alloy

作　　者：张兆栋[1] 刘黎明[1] 

机构地区：[1]大连理工大学材料科学与工程学院辽宁省先进连接技术重点实验室,116023

出　　处：《焊接》2010年第8期23-27,共5页Welding & Joining

基　　金：辽宁省博士启动基金(20091010)

摘　　要：以TiO_2和CaCl_2为活性剂,研究了传统活性焊以及活性焊丝焊接中熔深的增加作用,并分析了焊接过程中的电弧光谱行为。结果表明,采用传统活性焊方法以及活性焊丝焊方法均可以显著增加镁合金TIG焊的熔深,不同种类的活性剂增加熔深的效果不同,并且活性剂所处的位置不同,其增加熔深的效果也不相同。当使用TiO_2活性剂时,不管是涂敷在母材表面,还是涂敷在焊丝表面,均没有观察到其一次离子的谱线。而在活性焊丝焊接电弧中,观察到了Ca元素的一次离子的谱线,说明CaCl_2活性剂主要通过影响焊接电弧来增加焊接熔深,而TiO_2,活性剂增加焊接熔深的机理主要是影响熔池行为,对焊接电弧作用较小。The effects of TiO_2 and CaCl_2 activating fluxes on the weld penetration were studied based on the TIG welding of the magnesium al- loy with and without welding wire. A series of emission spectrum of arc plasma with A - TIG welding and flux coated wire welding of magnesium alloy were analyzed. It is found that all the fluxes can increase the weld penetration of the TIG welding whether it coated on the base metal or on the welding wire. There are different effects on the welding penetration for different coated position and different kind of fluxes. When the TiO flux were used, emission spectrum of Ti Ⅱ were not found, however, emission spectrum of Ca Ⅱ were found when the CaCl_2 were coated on the welding wire. It illustrated that the CaCl_2 flux increased the weld penetration mainly depending on the change of the welding arc, and the TiO_2 flux mainly depending on the change of welding pool.

关 键 词：活性焊 活性焊丝 镁合金 熔深 光谱 

分 类 号：TG401[金属学及工艺—焊接]