Structure and mechanical properties of laser-arc hybrid welding of 13Mn6 steel welded with austenitic filler

Abstract

In this article low-alloy structural steel 13Mn6 is welded by hybrid laser-arc welding. To increase the homogeneity of the weld metal during welding, an austenitic filler wire was used. To find out the working characteristics of the joint obtained by the HLAW method, metallographic studies were carried out, the microhardness of the welded joint was measured, tests for static tensile strength and static bending were carried out, and fatigue properties of the joint were also investigated. HLAW with the use of austenitic wire can positively influence the properties of the welded joint. In addition, when welding parameters vary, there is a possibility of penetration of the filler material to the entire depth of penetration, as well as to some partial value of its penetration. The article considers the principal possibility of joining heterogeneous materials on the example of 13Mn6 and 308SS steels.