Development of an Improved Electrode Coating : Development of an Improved Electrode Coating Composition for Welding of Structural Steels and Investigation of Its Effect on Weld Seam Microstructure and Fatigue Resistance

Abstract

In this study, an improved composition of electrode coating used in arc welding of structural steels was developed, and its effect on weld seam microstructure, mechanical properties, and fatigue resistance was investigated. The influence of titanium dioxide (TiO₂), aluminosilicate additives, microdispersed ferromanganese particles, and active deoxidizing agents incorporated into the coating was experimentally evaluated. Phase transformations occurring within the coating during thermal cycles, slag formation processes, and factors affecting arc stability were identified. The results obtained made it possible to optimize the electrode coating composition, demonstrating a significant improvement in weld seam strength, plasticity, and microstructural integrity.