The main objective of optimization of welding technology is to reduce the cost of production and the mass of joined elements while maintaining optimum durability. One of the new trends in the welding industry is performing welded joints with dissimilar materials. These types of welded structures are commonly used today in aviation, construction of steam power plants, chemical installations etc. At the moment, the research of this type of joints is carried out mostly by experimental study. However, due to the cost of experiments, numerical modeling becomes a useful tool for analyzing the relevant technological parameters of the process.

The paper concerns numerical analysis of thermal phenomena occurring in the butt welding of two different materials by laser welding. The temperature distribution for the welded butt-joint is obtained on the basis of numerical simulations performed in the ABAQUS program. Numerical analysis takes into account the thermophysical properties of welded plate made of two different materials.

Temperature distribution in analysed joints is obtained on the basis of numerical simulation in Abaqus/Standard solver, which allowed the determination of the geometry of laser welded butt-joint.