Analyzing wearmechanisms and developments of surface layers inWC/Co-cemented carbide cutting inserts is of great importance\r\nfor metal-cutting manufacturing. By knowing relevant processes within the surface layers of cutting tools during machining the\r\nchoice of machining parameters can be influenced to get less wear and high tool life of the cutting tool. Tool wear obviously\r\ninfluences tool life and surface integrity of the workpiece (residual stresses, surface quality, work hardening, etc.), so the choice\r\nof optimised process parameters is of great relevance. Vapour-deposited coatings onWC/Co-cemented carbide cutting inserts are\r\nknown to improve machining performance and tool life, but the mechanisms behind these improvements are not fully understood.\r\nThe interaction between commercial TiN-coated and uncoated WC/Co-cemented carbide cutting inserts and a normalised SAE\r\n1045 steel workpiece was investigated during a dry plain turning operation with constantmaterial removal under varied machining\r\nparameters. Tool wear was assessed by light-optical microscopy, scanning electron microscopy (SEM), and EDX analysis. The state\r\nof surface layer was investigated by metallographic sectioning. Microstructural changes and material transfer due to tribological\r\nprocesses in the cutting zone were examined by SEM and EDX analyses.
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