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Welding of 316L Austenitic Stainless Steel with Activated Tungsten Inert Gas Process

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Abstract

The use of activating flux in TIG welding process is one of the most notable techniques which are developed recently. This technique, known as A-TIG welding, increases the penetration depth and improves the productivity of the TIG welding. In the present study, four oxide fluxes (SiO2, TiO2, Cr2O3, and CaO) were used to investigate the effect of activating flux on the depth/width ratio and mechanical property of 316L austenitic stainless steel. The effect of coating density of activating flux on the weld pool shape and oxygen content in the weld after the welding process was studied systematically. Experimental results indicated that the maximum depth/width ratio of stainless steel activated TIG weld was obtained when the coating density was 2.6, 1.3, 2, and 7.8 mg/cm2 for SiO2, TiO2, Cr2O3, and CaO, respectively. The certain range of oxygen content dissolved in the weld, led to a significant increase in the penetration capability of TIG welds. TIG welding with active fluxes can increase the delta-ferrite content and improves the mechanical strength of the welded joint.

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Authors and Affiliations

  1. Materials Engineering Department, Sahand University of Technology, Tabriz, Iran

    E. Ahmadi

  2. Mining and Metallurgical Engineering Department, Amirkabir University of Technology, Tehran, Iran

    A. R. Ebrahimi

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  1. E. Ahmadi
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  2. A. R. Ebrahimi
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Correspondence to E. Ahmadi.

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Ahmadi, E., Ebrahimi, A.R. Welding of 316L Austenitic Stainless Steel with Activated Tungsten Inert Gas Process. J. of Materi Eng and Perform 24, 1065–1071 (2015). https://doi.org/10.1007/s11665-014-1336-6

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  • DOI: https://doi.org/10.1007/s11665-014-1336-6

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