Investigation of the Effect of the Thermal Welding Cycle on the Structure and Mechanical Properties of Steel 08cr22ni6ti

The results of studies on the effect of thermal effects caused by the simulation of the thermal welding cycle on the structure and mechanical properties of both the base metal and the metal of the thermal influence zone in welded joints of 08Cr22Ni6Ti steel are presented. It is shown that as a result of thermal exposure, there is an increase in the fragility of the zone of thermal influence, due to the growth of ferritic grains, as well as changes in the phase ratio. It has been found that stabilizing tempering at a temperature of 900 ° C increases the impact strength and reduces the hardness of 08Cr22Ni6Ti steel by reducing the total amount of released carbides, as well as increasing their dispersion.