SURFACE COATED CUTTING TOOL SUPERIOR IN HEAT RESISTANCE AND DEPOSITION RESISTANCE

• Main Author: SHIKADA SHINICHI
• Format: Patent
• Language: English
• Published: 08.09.2011
• 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; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MILLING; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TURNING

PROBLEM TO BE SOLVED: To provide a surface coated cutting tool whose hard coating layer exerts superior heat resistance and deposition resistance in high speed and high feed cutting of a hard-to-cut material such as a Ti-alloy, stainless steel and the like. SOLUTION: In the surface coated cutting tool in which the hard coating layer is formed on the surface of a tool base body, the hard coating layer is constructed of an alternately laminated layer of (a) and (b), in which (a) is a TiAl(M)N thin layer formed of a composite nitride layer of Ti, Al (and M) satisfying a composition formula: (Ti1-αAlα)N or a composition formula: (Ti1-α-βAlαMβ)N (where M is one or more additive components selected from periodic table group 4a, 5a, 6a elements, Si, B, Y excluding Ti, and 0.45≤α≤0.75 and 0.01≤β≤0.25 in terms of the atomic ratio), and (b) is a VYN thin layer formed of a composite nitride layer of V and Y satisfying a composition formula: (V1-γYγ)N layer (where 0.01≤γ≤0.1 in terms of the atomic ratio). COPYRIGHT: (C)2011,JPO&INPIT