CUTTING TOOL MADE OF SURFACE COATED TUNGSTEN CARBIDE RADICAL CEMENTED CARBIDE ALLOY HAVING EXCELLENT DAMAGE RESISTANCE IN CEMENTED CARBIDE COATING LAYER

PROBLEM TO BE SOLVED: To prevent a cutting blade from suffering from nicks and chipping by forming cemented carbide coating layer with aluminum oxide multiple layer. SOLUTION: An Al2 O3 layer is composed of at least two layers of S including Al2 O3 unit layer having its mean layer thickness of 0.5 t...

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Bibliographische Detailangaben
Hauptverfasser:	UNAMI KENICHI, HAMAGUCHI TAKEKI, OSADA AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	BORING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBINED OPERATIONS DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY OTHER WORKING OF METAL PERFORMING OPERATIONS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TURNING UNIVERSAL MACHINE TOOLS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent a cutting blade from suffering from nicks and chipping by forming cemented carbide coating layer with aluminum oxide multiple layer. SOLUTION: An Al2 O3 layer is composed of at least two layers of S including Al2 O3 unit layer having its mean layer thickness of 0.5 to 3μm and including S component of 0.01 to 0.2 atomic %, and composed of Al2 O3 , group multiple layer consisting of mutually laminate layer of at least one layer of CNO unit layer having 0.01 to 0.5μm mean layer thickness (Ti, Al). The mean layer thickness of this Al2 O3 multiple layer is set to 3 to 15μm. Film thickening is made possible by means of S containing Al2 O3 layer and by means of (Ti, Al) CNO layer, prevent ion of fragility can be attempted.