The article presents an analysis of the consumption of low-carbon steel and DLC coating working in a sliding combination with rotational motion and in various operating conditions. The influence of selected operational factors, i.e. the speed and load on wear and the coefficient of friction in sliding combination, as well as their graphical interpretation of test results based on the results obtained from experimental and metallographic investigations are shown. Tests carried out at the tribological stand T01M operating in the stem-disc system were preliminary tests. Initial tests allowed to determine the influence of the determined operating parameters on selected tribological properties. Low-carbon steel, designed for thermo-chemical treatment and DLC coating, was used for the tests. Metallographic examinations allowed to determine the dominant mechanism of wear, depending on external factors.Keywords: DLC coating, tribology, wear, hydraulic motors
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