PRODUCTION OF CUTTING TOOL MADE OF SURFACE-COATED CEMENTED CARBIDE EXCELLENT IN CHIPPING RESISTANCE

PROBLEM TO BE SOLVED: To produce a cutting tool made of surface-coated cemented carbide excellent in chipping resistance and showing excellent cuttability over a long period. SOLUTION: On the surface of the substrate of WC base cemented carbide, a hard coating layer contg. an Al2 O3 layer is formed...

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Bibliographische Detailangaben
Hauptverfasser:	UEDA TOSHIAKI, UNAMI KENICHI, HAMAGUCHI TAKEKI, OSADA AKIRA, KUNUGI HITOSHI
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 DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TURNING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To produce a cutting tool made of surface-coated cemented carbide excellent in chipping resistance and showing excellent cuttability over a long period. SOLUTION: On the surface of the substrate of WC base cemented carbide, a hard coating layer contg. an Al2 O3 layer is formed by the average layer thickness of 3 to 20μm by using a chemical vapor deposition process and/or a physical vapor deposition process to produce a cutting tool made of the surface-coated cemented carbide. In the formation of the Al2 O3 layer, as a reaction gas, an inert gas series reaction gas composed of, by volume, 0.5 to 15% AlCl3 , 0.5 to 30% CO2 , 0.01 to 1% TiCl4 , and the balance inert gas is used.