Arc Assisted Activating TIG Welding Process for Stainless Steels

Abstract

Abstract: A new activating TIG welding process for stainless steels called AA-TIG welding is proposed. The CO2+Ar mixing gas is used as the activating mixing shielding gas of the low current tungsten electrode arc. A series of single-arc AA-TIG welding experiments are made to study the effects of experimental parameters of low current tungsten electrode arc and normal TIG welding on the weld penetration of AA-TIG welding. For the optimal process parameters, the weld forming, weld microstructure, weld composition and weld property are also investigated. The results indicate that AA-TIG welding can be used to get full penetration of 10 mm thickness stainless steel plate in a single pass. Compared with conventional TIG welding, there is hardly any difference between the weld microstructures and the weld compositions of conventional TIG welding and AA-TIG welding. The Cu/CuSO4 corrosion resistance and the low temperature impact toughness of the weld of AA-TIG welding meet the related standards.

Key words: AA-TIG welding, Activating TIG welding, Stainless steel, Weld chemical composition, Weld forming, Weld microstructure, Weld property

CLC Number:

TG444

HUANG Yong;FAN Ding;LIN Tao;LUO Huansheng;YAN Xin;YANG Yuanjiang. Arc Assisted Activating TIG Welding Process for Stainless Steels[J]. , 2010, 46(8): 68-72.

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Arc Assisted Activating TIG Welding Process for Stainless Steels

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