Numerical Analysis of Heat Transfer of Arc Welded Plate

In submerged arc welding process, the understanding of temperature distribution is essential in order to control the dimension of heat affected zone and to get the required weld bead shape and size etc. Moreover, the temperature profile is required to estimate the stress distribution in thermo mechanical analysis of the process. In this work, a numerical solution for moving heat source with Gaussian distribution of heat flux density over the volume of oval shape is derived using finite difference method. Heat transfer in welded plates during welding from fusion zone to heat affected zone (HAZ) is assumed to be conductive heat transfer. Convective and radiative heat losses are also considered for remaining zone of welded plate. With the help of the numerical solution, transient temperature distribution is estimated. HAZ widths are also measured experimentally. Decent agreements between predicted and experimental values are achieved.