The finite-difference model for calculating temperature fields in linear friction welding is described. A feature of the model is the heat transfer across the friction surface accounting, which makes it possible to study the case of welding parts with different physical and mechanical properties. Modelling results, obtained for combination of VT6 and VT8-1 titanium alloys welding, are described. An assessment of the temperature field and heat transfer during the parts from VT6 and VT8-1 welding is given.

The article is devoted to the modeling of structural-phase transformations during automatic MIG welding of high-strength steel X80 in a welded seam and the heat affected zone in the ANSYS / Mechanical package. Based on the results of numerical modeling the relationship between the initial morphology of the steel microstructure and the parameters of the weld seam geometry was revealed.