活性剂对铝合金直流正接A-TIG焊熔深的影响  

Effects of activating fluxes on DC A-TIG welding penetration of aluminum alloy

作　　者：樊丁[1] 邵锋[2] 黄勇[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金省部共建教育部重点实验室,甘肃兰州730050

出　　处：《焊接技术》2007年第2期20-22,共3页Welding Technology

基　　金：有色金属新材料省部共建国家重点实验室开放基金(SKL04002);教育部春晖计划(Z2005-1-62007);教育部博士学科点专项基金(20040731001)

摘　　要：分别采用单质Te,Si,Se和Ti,卤化物MnCl_2,CdCl_2,ZnF_2,NaF等8种活性剂进行铝合金直流正接A-TIG焊,研究了活性剂对熔深的影响,试验结果表明:Te使熔深增加的同时减小熔宽,而Si,Se和Ti对熔深增加的作用不明显;卤化物MnCl_2,CdCl_2,ZnF_2,NaF都使熔深减小的同时也减小熔宽。同时进行了焊缝偏移试验。在此基础上分析了活性剂对导电通道电阻的影响,认为在单质组成的活性剂中,Te使得整体导电通道电阻增大;在卤化物活性剂中,NaF使得整体导电通道的电阻减小,而MnCl_2,CdCl_2,ZnF_2则使得整体导电通道的电阻增大。Elements of Te, Si, Se and Ti as well as the halides of MnCl_2, CdCl_2, ZnF_2 and NaF were served as activating fluxes to study the effects of mono-element activator on weld penetration of DC A-TIG welding for aluminum alloy. The result shows that Te can not only increase weld penetration, but also narrow weld width, while Si, Se and Ti have little effect to improve weld penetration. The halides of MnCl_2, CdCl_2, ZnF_2 and NaF reduce weld penetration as well as width. The weld excursion experiments result shows Te has larger effect than any others to make the welding line move to the area without activating flux. The halides of MnCl_2, CdCl_2 and ZnF_2 have the same effect as Te, while NaF has the opposite effect. Both the ratios of weld penetration and excursion have the same change current by comparing. On the base of experiments, it is believed that, in elements, Te can increase the whole resistance of conducting channel, so can the halides of MnCl_2, CdCl_2, ZnF_2, while NaF reduce the resistance.

关 键 词：铝合金A-TIG焊 焊缝熔深 焊缝偏移 导电通道 电阻 

分 类 号：TG457.14[金属学及工艺—焊接]