Abstract:

The most perspective method for hardening and recovery of the metallic surfaces is a process of welding (arc deposition), which ensures a solution to the very important task: optimal relation between the properties of surface and the bulk of a metallic material. In the presented work the hard and wear-resistant obtained using a powdery wire and chrome carbide during the electric-arc welding. Tribological properties of these sur-faces were studied in the conditions of 0.5 - 2,0MPa loading and 0.63 m/s speed during boundary friction using the 15W40 oil. It was established that under the same conditions the values of the sample’s friction coefficients are smaller by the order of magnitude than those of non-welded 40X steel friction pairs. Wear of the welded samples is insignificant as well. In comparison to the one-layer surface, two-layer welded one has a less friction coefficient, and at biggest loading, wear was not detected at all

Keywords: wire with powdery core; welding; friction coefficient.