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

• Main Authors: SUDO TOSHIKATSU, UCHIDA SUSUMU, TANAKA TETSUYA
• Format: Patent
• Language: English
• Published: 22.09.1998
• Edition: 6
• Subjects: 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

PROBLEM TO BE SOLVED: To provide a cutting tool made of surface-coated cemented carbide excellent in wear resistance and showing excellent cuttability over a long period. SOLUTION: This cutting tool made of surface-coated cemented carbide is composed by applying the surface of a carbide tool substrate composed of WC base cemented carbide or TiCN base cermet with a heated and oxidized layer of vapor deposited hard layer composed of one kind of single layer or two kinds of plural layers of (Ti, Al, M) N and (Ti, Al, M) CN expressed by the compositional formula of (Tia Alb Mc ) N and the compositional formula of (Tia Alb Mc ) Cd N1-d (where, by atomic ratio, a is 0.2 to 0.6, b is 0.1 to 0.79, c is 0.01 to 0.3, a+b+c=1 and d is 0.01 to 0.5 are satisfied, and M denotes any one kind among the groups 4a, 5a and 6a elements excluding Ti in a Periodic Table), and the composing layer of this heated and oxidized layer is composed of the one in which, on the base composed of (Ti, Al, M) NO or (Ti, Al, M) CNO, a hard coating layer having a structure in which fine Ti oxide, Al oxide and M oxide are dispersed and distributed is formed by the average layer thickness of 0.5 to 15μm.