The Effect of Linear Welding Energy on the Structure and Properties of Welded Joints of Ferrite-Austenitic Steels 08cr18mn8ni2ti and 08cr22ni6ti

The results of studies on the effect of linear welding energy on the structure and phase transformations in the metal of the zone of thermal influence of welded joints of 08Cr18Mn8Ni2Ti and 08Cr22Ni6Ti steels are presented. It is shown that the impact strength of the overheating area of the thermal influence zone at a temperature of 20 ° C has high impact strength values, and at a test temperature of minus 20 ° C, impact strength values below 0.4 MJ/m2 were obtained. It was revealed that the decrease in plasticity and strength is a consequence of the release of carbide and carbonitride phases along the grain boundaries and the formation of secondary cracks on the fracture surface of impact samples.