Study of the Sliding Wear and Friction Behavior of WC + NiCrBSi Laser Cladding Coatings as a Function of Actual Concentration of WC Reinforcement Particles in Ball-on-Disk Test
Authors: García, A., Fernández, M.R., Cuetos, J.M., González, R., Ortiz, A. and Cadenas, M.
Journal: Tribology Letters
This work studies the effects that different percentages of WC reinforcement particles produce on the wear of a NiCrBSi coatings obtained by laser cladding. The density of the WC particles, which is higher than those of the matrix, makes it necessary to control the volume provided from each material to maintain the height of the coating. In addition, said difference of density promotes the precipitation of the WC particles inside the Ni matrix, causing a non-homogeneous distribution of the particles in the cross section of the coating. Unlike other studies in which the adjusted concentration of WC in the feeder is considered (wt% WCfeeder concentration), this work studies the dry wear behavior of coatings, using a ball-on-disk configuration tests, as a function of the actual WC% by weight present on the surface tested for wear (wt% WCactual concentration), this being determined by image processing software. Wear decreases exponentially with the increase in WC concentration, to a limit of 27 wt% WCactual. At this limit, an increase in reinforcement particles does not generate a significant decrease in wear. The predominant wear mechanism varies depending on the wt% WCactual, passing from the adhesive and oxidative types to abrasive when WC percentage increases.
Study of the Sliding Wear and Friction Behavior of WC plus NiCrBSi Laser Cladding Coatings as a Function of Actual Concentration of WC Reinforcement Particles in Ball-on-Disk Test
Authors: Garcia, A., Fernandez, M.R., Cuetos, J.M., Gonzalez, R., Ortiz, A. and Cadenas, M.
Journal: TRIBOLOGY LETTERS
Source: Web of Science (Lite)