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<p>The welding by Gas Metal Arc Welding (GMAW) of dissimilar stainless steels SS202 and SS304 is now very useful in making things that need to hold a strong structure, and to resist corrosion. The SS202 and SS304 have different chemical compositions and conduct heat at different rates, it’s hard to get the best possible mechanical qualities in the area where they’re welded together. This work was done to make the best of GMAW parameters welding current (from 140 to 200&#xa0;A), arc voltage (from 18 to 26&#xa0;V), and welding speed (from 3 to 7&#xa0;mm/s) in order to raise the tensile and bend strength, and the micro hardness of the joined, different metals. A Taguchi L9 set of tests arranged in a specific way, was used to plan the tests, and Grey Relational Analysis was the method used to make the best of several responses at once. The best parameters turned out to be 200&#xa0;A welding current, 22&#xa0;V arc voltage, and 3&#xa0;mm/s welding speed. Under these ideal conditions, the welded joint showed the greatest tensile strength of 612&#xa0;MPa, a bending strength of 1.92 kN, and a microhardness of 248 HV in the weld area. It is found that welding current has the greatest effect on overall weld quality at 46.3% followed by welding speed which had a 39.7% and arc voltage which had 17.5%.</p>

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Optimization of GMAW process parameters for dissimilar welding of SS202 and SS304

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Sujeet Kumar,
  • P. S. Satheesh Kumar,
  • Movva Naga Swapna Sri,
  • Amaleswari Rajulapati,
  • M. Nomitha Reddy,
  • Deepak Gupta

摘要

The welding by Gas Metal Arc Welding (GMAW) of dissimilar stainless steels SS202 and SS304 is now very useful in making things that need to hold a strong structure, and to resist corrosion. The SS202 and SS304 have different chemical compositions and conduct heat at different rates, it’s hard to get the best possible mechanical qualities in the area where they’re welded together. This work was done to make the best of GMAW parameters welding current (from 140 to 200 A), arc voltage (from 18 to 26 V), and welding speed (from 3 to 7 mm/s) in order to raise the tensile and bend strength, and the micro hardness of the joined, different metals. A Taguchi L9 set of tests arranged in a specific way, was used to plan the tests, and Grey Relational Analysis was the method used to make the best of several responses at once. The best parameters turned out to be 200 A welding current, 22 V arc voltage, and 3 mm/s welding speed. Under these ideal conditions, the welded joint showed the greatest tensile strength of 612 MPa, a bending strength of 1.92 kN, and a microhardness of 248 HV in the weld area. It is found that welding current has the greatest effect on overall weld quality at 46.3% followed by welding speed which had a 39.7% and arc voltage which had 17.5%.