Study on Wear Properties and Mechanisms of Coated Carbide Tools in Dry Turning of 300M Steel

摘要

This paper deals with an experimental research on wear properties and mechanisms of coated carbide tools in dry turning of 300M steel which are widely used to manufacture the central spindle, wheel gear, aerofoil fastener and so on. Based on Makarow's theory, the minimum surface wear rate h_s - 2.88 μm and the optimal cutting speed v = 200 m/mim were attained under the condition of the feed rate f= 0.1 mm/r and the depth of cut a_p= 0.15 mm. Analysis carried out with the SEM suggests that adhesion of workpiece material and chipping are dominant wear mechanisms. There was no observation of oxygen existing based on the analysis of EDS which indicated no oxidation wear generated during the turning machining.