Tribological properties of the stellite electro-spark deposited coatings

W pracy badano właściwości powłok nanoszonych elektroiskrowo. Ocenę właściwości powłok przeprowadzono na podstawie obserwacji mikrostruktury, badań odporności korozyjnej oraz pomiarów siły tarcia. Badania przeprowadzono wykorzystując stellit jako materiał powłokowy (anodę) nakładane elektroiskrowo na próbki ze stali C45 (katody). Do naniesienia powłok zastosowano urządzenia EIL-8A. Powłoki tego typu mogą spełniać funkcje odporności na zużycie oraz odporności na korozję.Depositing protective layers on metal surfaces frequently involves matter and energy transfer, which is accompanied by various chemical, electrochemical and electrothermal reactions. To determine the operational properties of a surface layer, it is necessary to analyse the original, technological properties of the material, the deposition method, and, particularly, the mechanism of energy accumulation inside and outside the workpiece. By controlling polarity, it is possible to remove or replace material. The process of material growth resulting from electroerosion is known as electro-spark alloying (ESA) or electro-spark deposition (ESD). The erosion of the anode and the spark discharges between the electrodes result in the formation of a surface layer with properties different from those of the base material. The paper is concerned with determining the properties of electro-spark coatings. The properties were assessed by analysing microstructure, measuring the microhardness, friction force and corrosion resistance. The tests were carried out on a stellite coating (the anode) obtained by electro-spark deposition over carbon steel C45 (the cathode). The coatings were deposited by means of an EIL-8A. The electro-spark deposited coatings are likely to be applied to increase wear resitance and corrosion resistance