Determination of mechanical and tribotechnical properties of coatings during laser surfacing of tool steels

The paper considers the results of metallographic studies and tribotechnical tests samples 9CrSi tool steel multicomponent coatings obtained by laser surfacing with addition ultrafine titanium carbide particles into charge. As an additional parameter, transverse high-frequency oscillations beam along normal to velocity vector were used. Tribotechnical carried out according scheme “the plane is end annular 40Cr plate volumetric hardening”. To determine critical sliding speeds, performed at a constant pressure 2.5 MPa. Industrial I20 oil was fed friction zone. minimum values coefficients depending on speed when 7 vol% introduced bully increases 2, 2.7 3.5 times charge without carbides introduction 4 carbide, respectively. Coatings high content hardening phase had greatest wear resistance. Laser technology can be applied restoration worn surfaces rolls rolling mills, die-cutting dies other parts die tooling.