Coated cutting tool insert

The present invention relates to a CVD-coated cutting tool insert with a TiCxNy layer with a low tensile stress level of from about 50 to about 390 MPa and an alpha-Al2O3 layer with a high surface smoothness with a mean Ra is equal to or less than about 0.12 mum as measured by AFM-technique. This is...

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Bibliographische Detailangaben
Hauptverfasser:	KJELLGREN JAN, LITTECKE PETER, NORDLUND HENRIK
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS 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 DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY PERFORMING OPERATIONS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a CVD-coated cutting tool insert with a TiCxNy layer with a low tensile stress level of from about 50 to about 390 MPa and an alpha-Al2O3 layer with a high surface smoothness with a mean Ra is equal to or less than about 0.12 mum as measured by AFM-technique. This is obtained by subjecting the coating to an intensive wet blasting operation.