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HUANG Yong, FAN Ding, YANG Peng, LIN Tao. Effects of activating fluxes on AC A-TIG weld penetration of magnesium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (6): 41-44.
Citation: HUANG Yong, FAN Ding, YANG Peng, LIN Tao. Effects of activating fluxes on AC A-TIG weld penetration of magnesium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (6): 41-44.
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Effects of activating fluxes on AC A-TIG weld penetration of magnesium alloy

  • State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China

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  • Received Date: July 11, 2006
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  • AC A-TIG welding experiments of magnesium alloy were carried out to study the effects of surface activating fluxes on weld penetration.Elements including Te, Ti and Si, oxides including SiO2, TiO2 and V2O5, halides including MnCl2, CdCl2 and ZnF2 were used as activating fluxes, respectively.It is found that, Te powder, ZnF2 and CdCl2 all can increase weld penetration dramatically.Especially for Te powder, weld penetration reaches 1.6 times of that of conventional TIG welding.Weld depth width ratio reaches 0.43.Ti powder has little effect on weld penetration and weld width.All V2O5, SiO2, TiO2, MnCl2 and Si powder decease weld penetration and weld width.Among the three activating fluxes improving weld penetration obviously, both Te powder and ZnF2 refine weld grain.CdCl2 coarsens weld grain a little.The results indicate that, electron adsorption with activating flux particles of Te powder, ZnF2 and CdCl2 can constrict arc and increase weld penetration of AC TIG welding of magnesium alloy.
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