Simulation Of Temperature Profile In Longitudinal Welded Tubes During High-Frequency Induction (HFI) Welding

The temperature profile of the Heat Affected Zone (HAZ) during induction welding is one of the most important factors to obtain a good weld quality of High-Frequency Induction (HFI) welded steel tubes. In this work, numerical computation of the 3D temperature profile in the steel tube has been done by coupling the electromagnetic model with the transient thermal model. The current and the magnetic fields in the tube, coil, and impeder have been evaluated. The resulting power from the induced current is used to evaluate the temperature in the joining edges of the tube. The continuous tube movement has been implemented by considering the transient thermal model of the tube. The simulations consider non-linear electromagnetic and thermal properties of the steel when it undergoes temperature rise to the welding temperature. The temperature profile from the resulting simulation gives information to control the subsequent process of joining the edges of the steel tube.