Effect of the composition of multicomponent powders on the mechanical and tribotechnical properties of coatings obtained by laser additive technologies

The paper presents the results of metallographic studies and tribotechnical tests samples medium-carbon steel 34KhNi3MoA coatings obtained by laser surfacing a powder multicomponent charge based on iron cobalt in ratio 3:1 with additives nano particles tantalum carbide. were processed circular defocused beam transverse oscillations normal to scanning speed. Comparative for friction wear carried out pair hardened 40Kh counterplate. load sliding speed during varied discretely. Turbine oil TP 22C was used as lubricant. It is shown that introduction nano-tantalum carbide into reduces losses, increases resistance compared without carbides base material. an increase amount hardening phase original steel. has been established technology can be restore worn surfaces shaft necks, turbine blades, thrust discs, shut-off valves other parts operating at high temperatures corrosive environments.