This paper discusses the wear of the turning tool bit in face turning under lubricated friction conditions. The test results obtained after wet turning, i.e. turning in the presence of mineral oil-based cutting fluid, were compared with the data registered under dry friction conditions. The experiments were performed on a CTX 310 ECO CNC machine tool. The tool wear after face turning was analysed using an SX80 stereo zoom microscope. The workpiece surface texture was studied with a Talysurf CCI Lite non-contact 3D profiler. A JSM 7100F scanning electron microscope equipped with an EDS microanalysis system was employed to identify the elements on the surface of the tool tips. The tribological tests were carried out with a T-01 M tribometer for a ball-on-disc configuration in the sliding contact. The use of the cutting fluid resulted in lower wear of the tool, as concluded from smaller depths of the wear tracks.Keywords: Cutting fluid, turning, friction, wear
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