Properties of stellite layers produced by electro-spark deposition

The paper investigates the properties of electro-spark deposited coatings based on microstructure observations, corrosion resistance tests, and friction force measurements. The research was conducted using stellite as a coating material, applied via electro-spark deposition onto C-steel samples. As a result of the conducted studies, it was found that the thickness of the obtained stellite layers is 10÷15 µm and that the layers are characterized by the absence of pores and microcracks, exhibiting a diffusive bond with the substrate. The microhardness of the applied stellite layers is approximately 2.5 times higher than the microhardness of the substrate material. Corrosion tests demonstrated higher corrosion resistance of the stellite layers compared to the substrate material. Coatings of this type exhibit increased resistance to wear and corrosion.THE PROPERTIES OF STELLITE ALLOY LAYERS APPLIED BY ELECTRO-SPARK DEPOSITION
The paper is concerned with the properties of electro-spark deposited Stellite alloy coatings. The properties were determined by analyzing the microstructure and corrosion resistance of the layers and measuring the friction forces. The tests were conducted for Stellite alloy coatings electro-spark deposited over the C carbon steel substrate. It was found that the Stellite alloy layers were 10÷15 µm in height, they had no pores or microcracks, and there was diffusive interaction with the substrate. Moreover, the microhardness of the Stellite layers was about 2.5 times higher than that of the substrate. The tests show that the electro-spark deposited Stellite coatings are characterized by higher resistance to corrosion than that of the substrate. Coatings of this type provide improved wear and corrosion protection. Ph.D. Eng. (…)

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