Physical Simulation Of Individual Heat-Affected Zones In S960mc Steel

This research is focused on the analysis of heat-affected sub-zones in 2 mm thick steel 8960MC samples, with the aim of observing and evaluating the mechanical properties after exposure to temperatures corresponding to individual heat-affected sub-zones. lest samples were prepared using a Gleeble 3500 thernao-mechanical simulator. The samples were heated in the range from 550 degrees C to 1350 degrees C and were subsequently quickly cooled. The specimens, together with the base material, were then subjected to tensile testing, impact testing, and micro-hardness measurements in the sample cross-section, as well as evaluation of their microstructure. Fracture surfaces are investigated in samples after impact testing. The heat-affected sub-zones studied indicate high sensitivity to the thermal input of welding. There is a significant decrease in tensile strength and yield strength at temperatures around 550 degrees C.