Porosity and Surface Defect Analysis in Dissimilar Metal Welding (DMW) of Carbon Steel and Stainless Steel
Analisa Porositas dan Cacat Permukaan pada Dissimilar Metal Welding (DMW) Baja Karbon dan Stainless Steel
DOI:
https://doi.org/10.21070/ups.10905Keywords:
Dissimillar Metal Welding (DMW), Carbon Steel, Stainless SteelAbstract
Welding is an essential process construction and metal manufacturing industries, particularly joining dissimilar materials (dissimilar metal welding). One most commonly used material combinations carbon steel and stainless steel, as they offer complementary mechanical properties and corrosion resistance. This study aims to analyze effect \welding current variations formation porosity and surface defects dissimilar metal welding between carbon steel and stainless steel using stainless steel electrodes. The welding currents applied were 80A, 100A, and 120A. The results indicate that both excessively low and excessively high welding currents tend cause welding defects, such as porosity, spatter, and undercut. A welding current of 100A produced best weld joint quality compared to 80A and 120A, as no defect indications were found in several specimens during both penetrant and macrostructural tests. Therefore, it can be concluded proper selection welding current and control welding speed play crucial role in minimizing defects and improving the quality dissimilar metal.
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