To provide a surface coated cutting tool having a hard coating layer for exhibiting excellent chipping resistance and abrasion resistance under a high speed cutting condition of a heat resistant alloy such as an Ni group alloy ad a Co group alloy.
The surface coated cutting tool is provided by depositing and forming the hard coating layer composed of an alternately laminated structure of a double layer area of alternately laminating a thin layer A of a layer thickness of 1-50 nm and a thin layer B of a layer thickness of 1-50 nm and a single layer area constituted of a single layer of a layer thickness of 100-500 nm on a tool base body surface. The thin layer A is an [Al1-X-YTiXSiY]N(X is 0.15-0.94 in the atomic ratio, and Y is 0.30-0.80 in the atomic ratio) layer, and the thin layer B is a [Ti1-ZCrZ]N(Z is 0.10-0.90) layer, and the single layer is constituted of a layer of the same material kind as the thin layer A or the thin layer B.
Kazuo Tomita
Masayuki Miyake