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Metallurgy, welding, Métallurgie, soudage, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Metaux. Metallurgie, Metals. Metallurgy, Généralités, General, Transformation de matériaux métalliques, Production techniques, Traitements thermiques, Heat treatment, Traitements thermochimiques et traitements par diffusion, Thermochemical treatment and diffusion treatment, Corrosion, Action des agents de corrosion, Corrosion environments, Propriétés mécaniques. Rhéologie. Mécanique de la rupture. Tribologie, Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology, Frottement. Usure, Contact of materials. Friction. Wear, Etat surface, Surface conditions, Estado superficie, Oberflaechenzustand, Propriété mécanique, Mechanical properties, Propiedad mecánica, Traitement thermochimique, Thermochemical treatment, Tratamiento termoquímico, Thermochemische Behandlung, Filage, Spinning, Hilado, Strangpressen, Formage, Forming, Conformado, Umformen, Matrice formage, Die, Matriz formadora, Matrize, Nitruration, Nitriding, Nitruración, Nitrieren, Oxydation, Oxidation, Oxidación, Placage ionique, Ion plating, Enchapado iónico, Ionenplattieren, Rugosité, Roughness, Rugosidad, Rauhigkeit, Résistance corrosion, Corrosion resistance, Resistencia corrosión, Korrosionsbestaendigkeit, Résistance usure, Wear resistance, Resistencia al desgaste, Verschleissfestigkeit, Traitement surface, Surface treatment, Tratamiento superficie, Oberflaechenbehandlung, Tribologie, Tribology, Tribología, Usure, Wear, Desgaste, Verschleiss, arc ion plating, bearing, extrusion, nitriding, and surface roughness

Resistance of wear and oxidation of hard-coated die for aluminum extrusion is investigated. Nitrided layer was prepared by radical nitriding method, and the 3 μm hard coat films, CrN, TiN, TiAlN and TiAlCrN, were prepared by arc ion plating. Hardness, friction coefficient, critical load and roughness (Ra) of hard-coated specimens (SKD61) were observed before and after oxidation at atmosphere, 500°C-5 h. Roughness (Ra) of coated area of die before extrusion and after removal of adhesive aluminum were compared. Surface composition of coated area after 5 extrusions were analized by ESCA. In the case of nitrided die, whole coated area was oxidized, scraches (depth: 2 μm, width: 20 μm) had occurred in the direction of extrusion and roughness (Ra) was increased after 5 extrusions. On the contrary, the roughness of the coated area with TiAlN films hardly changed after 5 extrusions. TiAlN coated die showed higher durability in comparison with dies coated with nitrided, because of the higher oxidation resistance of TiAlN.

Condensed state physics, Physique de l'état condensé, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines interdisciplinaires: science des materiaux; rheologie, Cross-disciplinary physics: materials science; rheology, Science des matériaux, Materials science, Méthodes de dépôt de films et de revêtements; croissance de films et épitaxie, Methods of deposition of films and coatings; film growth and epitaxy, Composé minéral, Inorganic compound, Compuesto inorgánico, Couche mince, Thin film, Capa fina, Croissance cristalline, Crystal growth, Crecimiento cristalino, Diffraction RX, X ray diffraction, Difracción RX, Etude expérimentale, Experimental study, Estudio experimental, Polissage, Polishing, Pulimiento, Support, Soporte, Supraconducteur haute température, High temperature superconductor, Supraconductor alta temperatura, Traitement surface, Surface treatment, Tratamiento superficie, and Support SrTiO3

Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Physicochimie des polymeres, Physicochemistry of polymers, BOIS PLACAGE, PROPRIETE SURFACE, MOUILLABILITE, ADHERENCE, TRAITEMENT SURFACE, EXTRACTION, SABLAGE, CONTREPLAQUE, INFLUENCE DE, VENEER, SURFACE PROPERTIES, WETTABILITY, ADHESION, SURFACE TREATMENT, SAND BLASTING, PLYWOOD, INDUSTRIE CHIMIQUE, CHEMICAL INDUSTRY, and INDUSTRIA QUIMICA