Modelo numérico de formación de cordón y distribución de calor en la soldadura de pases de revenido para el proceso de reparación de un rodete tipo PELTON

Abstract

The present research work is based on the calculation of the temperature inherent to the welding cycle of the Pass Pass Reheat, a process used for the recovery of Pelton Impellers. This temperature established by the welding parameters such as voltage, amperage and travel speed are crucial for the thermally affected zone, which can change its microstructure and increase its hardness. Four experiments have been carried out in which the welding parameters were combined, and the temperature and hardness were calculated. The hardness was checked by testing and the temperature was checked by finite element analysis software. By means of calculations, computational modeling and experimentation, it was determined that the microstructure obtained in the HAZ is tempered martensite, and that the hardness value is similar to that of the base material, providing functionality to the impeller. Additionally, a temperature comparison was performed to confirm that the analysis point is far from the welding source.