Contribution à l'amélioration de la durée de vie d'outils carbure pour l'usinage du MDF (Medium Density Fiberboard) par application de dépôts ternaires (CrAlN, CrVN) et modification de l'arête de coupe

Abstract : In this work, we have been developed new protective treatments based on hard thin films like transition metal nitrides, to improve the service life of cutting tools when machining MDF panels (Medium Density Fiberboard). As the edge is submitted to severe loads, these coatings must present good physicochemical, mechanical and tribological properties. In previous works, as promising results were obtained using CrN films, we tried to improve the properties of this binary system by adding a second metallic element such as Al and V. Thus, layers of CrAlN and CrVN were synthesized by RF dual magnetron sputtering. We were especially interested in the effect of the Al and V content on the CrAlN and CrVN properties, respectively. The optimized coatings were then applied on tungsten carbide inserts to be tested in milling of three different types of MDF panels (Standard, Waterproof and Fireproof), taking into account the panel density profile and its thickness effects. A procedure of " pre-running " has been proposed on tungsten carbide inserts and PVD coatings have been done on modified or unmodified inserts. The results have shown that using of thin films can provide significant improvements in terms of wear resistance and that pre-running before deposition is strongly recommended for better adhesion of the layer
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Submitted on : Monday, June 27, 2011 - 10:38:49 PM
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Yacine Benlatreche. Contribution à l'amélioration de la durée de vie d'outils carbure pour l'usinage du MDF (Medium Density Fiberboard) par application de dépôts ternaires (CrAlN, CrVN) et modification de l'arête de coupe. Science des matériaux [cond-mat.mtrl-sci]. Arts et Métiers ParisTech, 2011. Français. ⟨NNT : 2011ENAM0014⟩. ⟨pastel-00604028⟩

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