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 and 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 0.01-0.15 in the atomic ratio) layer, and the thin layer B is a [Ti1-zVz]N((z) is 0.25-0.75 in the atomic ratio) 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