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Study of the Performance of Stainless Steel A-TIG Welds

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Abstract

The purpose of the present work was to investigate the effect of oxide fluxes on weld morphology, arc voltage, mechanical properties, angular distortion and hot cracking susceptibility obtained with TIG welding, which applied to the welding of 5 mm thick austenitic stainless steel plates. A novel variant of the autogenous TIG welding process, oxide powders (Al2O3, Cr2O3, TiO2, SiO2 and CaO) was applied on a type 304 stainless steel through a thin layer of the flux to produce a bead on plate welds. The experimental results indicated that the increase in the penetration is significant with the use of Cr2O3, TiO2, and SiO2. A-TIG welding can increase the weld depth to bead-width ratio, and tends to reduce the angular distortion of the weldment. It was also found that A-TIG welding can increase the retained delta-ferrite content of stainless steel 304 welds and, in consequence, the hot-cracking susceptibility of as-welded is reduced. Physically constricting the plasma column and reducing the anode spot are the possible mechanism for the effect of certain flux on A-TIG penetration.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan

    S. W. Shyu & C.P. Chou

  2. Department of Mechanical Engineering, National United University, Miaoli, 360, Taiwan

    S. W. Shyu

  3. Department of Technology, Ten Gun Industrial Co., Ltd, Taichung, 407, Taiwan

    H. Y. Huang

  4. Department of R&D, Aritex Products Co., Ltd, Kaohsiung, 831, Taiwan

    K. H. Tseng

Authors
  1. S. W. Shyu
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  2. H. Y. Huang
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  3. K. H. Tseng
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  4. C.P. Chou
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Correspondence to S. W. Shyu.

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Shyu, S.W., Huang, H.Y., Tseng, K.H. et al. Study of the Performance of Stainless Steel A-TIG Welds. J. of Materi Eng and Perform 17, 193–201 (2008). https://doi.org/10.1007/s11665-007-9139-7

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  • DOI: https://doi.org/10.1007/s11665-007-9139-7

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