Physical and mechanical properties of high-strength steel joints produced by laser welding

Based on obtained experimental data, the influence of specific structural parameters (phase composition, grain and subgrain structures) on the mechanical properties of welded joins depending on the laser welding modes is established. Technological modes of laser welding of high-strength 14KhGN2MDAFB steel have been determined, which provide the optimal structure and phase composition and thus high indicators of mechanical properties of welded joints. The obtained results showed the prospects of using technological modes of laser welding, which provide the necessary complex of mechanical properties of welded joints by forming the most favorable structure of the weld metal and the heat affected zone.