SURFACE COATED CUTTING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a coated tool capable of exhibiting excellent chipping resistance and wear resistance even when cutting a precipitation hardening stainless steel or a heat resistant alloy such as inconel under high speed cutting condition.SOLUTION: A hard coated layer includes a lower layer made from a Ti compound having a cubic crystal structure consisting of one or two or more layers among a TiAlN layer, a TiAlC layer, and a TiAlCN layer (X is 0.65≤X≤0.95 in an atom ratio representing a content ratio of Al) of a predetermined single layer average layer thickness; an intermediate layer made from a Cr compound having a cubic crystal structure consisting of one or two or more layers among a CrAlN layer, a CrAlC layer, a CrAlCN layer (Y is 0.60≤Y≤0.90 in an atom ratio representing a content ratio of Al) of a predetermined single layer average layer thickness; and an upper layer made from AlOhaving an average layer thickness and a minute vacancy of a predetermined hole diameter and vacancy density.