Modeling simulation of structure in a heat-affected zone of welded joint from low-alloyed steels

Simulation modeling of processes in the heat-affected zone by welding low-alloyed steels is of particular importance. This technique is used to study the structure of the metal in heat-affected zone by hidden arc welding of pipes. The causes of a low impact strength in the area of large grain of heat-affected zone welding steel K70 are determined.