A Technique for Experimental Study of the Wear Resistance of Coatings Obtained by Plasma Selective Baking of Powders on a SMTs-2 Friction Machine

Abstract

A technique for determination of the wear resistance of the surface layers of rubbing frictional pair is presented. The layers were obtained by different methods of hardening, including coatings applied by the plasma bake on procedures both in conditions of the steady-state friction and upon of acceleration or deceleration of the frictional pair. The method is based on determination of the wear and antifriction properties of cylindrical disc-type specimens, one of them is the reference one, and the other is hardened under conditions of rolling and sliding friction at a normal temperature. The error of measuring the friction coefficient is 0.5%. To increase the wear resistance of the machine parts, a large number of methods aimed at strengthening the material are used: thermal hardening, surface-plastic deformation, alloying of the workpiece material, additional machining, depositing of special, wear-resistant coatings on the surface of the part upon manufacturing or reconditioning. Experimental studies of the wear resistance of the coatings recovered by plasma selective baking demonstrated that the developed technique is advantageous for high accuracy and can be successfully used for evaluation of the quality of coatings.