Comparative Analysis of Weld Quality of Gas Metal Arc Welding with Pulse Current of HighStrength Low-Alloy Steel and Stainless Steel

Gas Metal Arc Welding (GMAW) with pulse current has gained prominence as a versatile technique for joining various materials, including high-strength low-alloy steel (HSLA) as well as stainless steel. This study aims to perform a comparative analysis of GMAW with pulse current applied to these two distinct materials in terms of weld quality and microstructural characteristics. The research methodology involved laying out of weld bead on both HSLA and stainless steel plates separately, with GMAW performed under identical welding conditions but varying pulse current parameters. Weld bead geometry and microstructural analysis were carried out to evaluate the welds' quality and performance.<br><br>Results indicate that pulse current GMAW exhibited notable differences in weld bead profiles and others, including the penetration characteristics between HSLA and stainless steel. Microstructural examination revealed distinct grain structures and phase compositions in the fusion zones of the two materials. Mechanical tests demonstrated variations in hardness properties, highlighting the influence of pulse current on the final weld properties. In conclusion, this comparative analysis sheds light on the nuanced effects of pulse current GMAW on high-strength low-alloy steel as well as stainless steel welding. The findings provide valuable insights into optimizing welding parameters for these materials, enhancing weld integrity, and tailoring mechanical properties to meet specific application requirements.