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This paper investigates the influence of substrate grain size on the behavior of a multilayer CrN/CrAlN coating, with the bilayer thickness varying across the cross-section in the range of 200–1000 nm. The substrate tools were made of WC-Co sintered carbide with three different grain sizes. The coatings were subjected to mechanical and tribological tests to assess their performance, including nanohardness, scratch resistance, and tribological testing. The coating’s roughness was measured using a 2D profilometer. Additionally, the chemical composition and surface morphology were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX). The durability tests were performed on an industrial CNC machine tool on the particleboard. The results revealed that tools with ultra-fine nano-grain (S) and micro-grain (T) WC-Co substrates exhibited a significant increase in tool durability by 28% and 44%, respectively. Significant differences in the microgeometry of the substrate U, especially in relation to the tool based on substrate S, explain the lack of improvement in its durability despite the use of a multilayer coating.
Details
; Nouveau Corinne 3
; Lagadrillere Denis 3 ; Betiuk Marek 4 ; Rygier Tomasz 4 ; Kulikowski Krzysztof 2
; Kusznierewicz Zbigniew 5 ; Sobiecki, Jerzy Robert 2 1 Department of Wood Mechanical Processing, Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences, Nowoursynowska 159 Str., 02-787 Warsaw, Poland
2 Faculty of Material Engineering, Warsaw University of Technology, Wołoska. 141 Str., 02-507 Warsaw, Poland
3 Department of Materials and Surface Engineering, Institute of Technology, Porte de Paris 13 Str, 71250 Cluny, France
4 Łukasiewicz—WIT. Metals and Alloys Processing and Protective Coatings Center, Duchnicka 3 Str, 01-796 Warsaw, Poland
5 Faculty of Mechatronics, Warsaw University of Technology, Andrzeja Boboli 8 Str, 02-525 Warsaw, Poland; [email protected]