SIMULATION OF REPAIR WELDING ON PEARLITIC RAILWAY STEEL USING ADDITIVE MANUFACTURING EQUIPMENT

Paper in proceeding, 2022

Large variations in heat input and cooling rates can occur during repair welding, which can affect the material properties of railway steel. Grinding can also expose the material to short-term, high-power heating. This study investigates the material properties and residual stress state after heating by laser scanning using both Additive Manufacturing equipment and Laser Welding equipment. The results show that these methods are comparable and could possibly be used to simulate repair welding. Improved welding simulations can expand the possibilities for repair welding and increase the reliability of welding procedures in railway maintenance.