Cutting tool
AssigneeSumitomo Electric Industries, Ltd.
InventorsHaruyo Fukui, Nozomi Tsukihara, Anongsack Paseuth, Toshihiro Tabata
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Abstract
A cutting tool is a cutting tool comprising a substrate and a coating film disposed on the substrate, in which the coating film includes a first layer, the first layer is composed of an alternate layer where a first unit layer and a second unit layer are alternately stacked, the first unit layer is composed of Ti1-a-bAlaCebN, a is 0.350 or more and 0.650 or less, b is 0.001 or more and 0.100 or less, the second unit layer is composed of AlcCr1-cN, c is 0.40 or more and 0.75 or less, and a and c satisfy a relationship of c>a.
Claims8
A cutting tool comprising a substrate and a coating film disposed on the substrate, wherein
- the coating film includes a first A layer,
- the first A layer comprises a first unit layer and a third unit layer that are alternately stacked,
- the first unit layer is composed of Ti1-a-bAlaCebN,
- a is 0.350 or more and 0.650 or less,
- b is 0.001 or more and 0.100 or less,
- the third unit layer is composed of AldCr1-d-eMeN,
- M is silicon or boron,
- d is 0.40 or more and 0.75 or less,
- e is more than 0 and 0.05 or less, and
- a and d satisfy a relationship of d>a;
- wherein the coating film further includes a second unit layer disposed between the substrate and the first A layer;
- wherein the second unit layer has a composition that is the same as a composition of the first unit layer or a composition of the third unit layer;
- wherein the second unit layer has a thickness of 0.1 μm or more;
- and
- wherein the thickness of the second unit layer is 2.0 times or more and 500 times or less than a thickness of the first unit layer or the third unit layer.
Dependencies are inferred from the claim text.