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

• Main Authors: SUDO TOSHIKATSU, TANAKA TETSUYA, SAKURAI KEIICHI
• Format: Patent
• Language: English
• Published: 26.03.1999
• Edition: 6
• Subjects: ALLOYS; 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; FERROUS OR NON-FERROUS ALLOYS; 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; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TURNING; UNIVERSAL MACHINE TOOLS

PROBLEM TO BE SOLVED: To provide a cutting tool made of surface coated cemented carbide, exhibiting superior wear resistance over a long period and excellent in chipping resistance. SOLUTION: The cutting tool made of surface coated cemented carbide is produced by vapor-depositing, to 2 to 20 μm average layer thickness, a hard coating layer in a state of single or double layer, constituted of either or both of (Ti, Al, Pb)N represented by the compositional formula (Tia Alb Pbc )N and (Ti, Al, Pb)CN represented by the compositional formula (Tia Alb Pbc )Cd N1-d , on the surface of a base material made of cemented carbide composed of WC base cemented carbide or Ti CN-base cermet. In the above formulae, the symbols (a), (b), (c), and (d) stand for, by atomic ratio, 0.2-0.6, 0.1-0.79, 0.01-0.3, and 0.01-0.5, respectively, and a+b+c=1 is satisfied.