SURFACE-COATED CUTTING TOOL

A coated tool with a hard coating layer, which has an excellent hardness and heat insulating effect; and exhibits an excellent chipping resistance and an excellent fracturing resistance for a long-term usage, is provided. The hard coating layer included in the coated tool has a chemically vapor depo...

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Bibliographische Detailangaben
Hauptverfasser:	TATSUOKA SHO, IWASAKI NAOYUKI, YAMAGUCHI KENJI, OSADA AKIRA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A coated tool with a hard coating layer, which has an excellent hardness and heat insulating effect; and exhibits an excellent chipping resistance and an excellent fracturing resistance for a long-term usage, is provided. The hard coating layer included in the coated tool has a chemically vapor deposited alternate laminated structure, which is made of: a region A layer and a region B layer, each of which is expressed by the composition formula of (Ti 1-x Al x )(C y N 1-y ); and has the average total layer thickness of 1-10 µm. In the region A layer, relationships, 0.70¤x¤0.80 and 0.0005¤y¤0.005, are satisfied; the average grain width W is 0.1 µm or less; and the average grain length L is 0.1 µm or less. In the region B layer, relationships, 0.8¤x¤0.95 and 0.0005¤y¤0.005, are satisfied; the average grain width W is 0.1-2.0 µm; and the average grain length L is 0.5-5.0 µm.