초록 ▼

In a coated hard tool, a hard coating is formed on a hard base material, wherein the coating includes ten or more sublayers of types A and B stacked alternately. In the sublayer of type A, a plurality of secondary sublayers of different types each having a thickness of 1 to 50 nm are stacked periodi

In a coated hard tool, a hard coating is formed on a hard base material, wherein the coating includes ten or more sublayers of types A and B stacked alternately. In the sublayer of type A, a plurality of secondary sublayers of different types each having a thickness of 1 to 50 nm are stacked periodically and repeatedly, while the sublayer of type B is formed of a single layer. The sublayers each have a thickness of 100 to 1000 nm. Each sublayer contains at least one compound selected from a nitride, a carbide, a nitrided carbide and an oxide containing at least one element selected from elements of periodic group 4A, elements of periodic group 5A, Al and B.

대표청구항 ▼

[ What is claimed is:] [1.] A coated hard tool including a hard base material and a hard coating on a surface of said base material, whereinsaid coating includes a total of at least four type A sublayers and type B sublayers stacked alternately starting with a type A sublayer or a type B sublayer at

[ What is claimed is:] [1.] A coated hard tool including a hard base material and a hard coating on a surface of said base material, whereinsaid coating includes a total of at least four type A sublayers and type B sublayers stacked alternately starting with a type A sublayer or a type B sublayer at least indirectly on said surface of said base material,said type A sublayer has a thickness in a range of 100 to 5000 nm, and includes a plurality of at least first secondary sublayers and second secondary sublayers successively stacked periodically and repeatedly with each other, wherein said first secondary sublayers respectively have a first composition including at least one compound selected from a nitride, a carbide, a nitrided carbide and an oxide containing at least one element selected from periodic group 4A elements, periodic group 5A elements, Al and B, wherein said second secondary sublayers respectively have a second composition different from said first composition and including at least one compound selected from a nitride, a carbide, a nitrided carbide and an oxide containing at least one element selected from periodic group 4A elements, periodic group 5A elements, Al and B, and wherein each said secondary sublayer has a thickness in a range of 1 to 50 nm,said type B sublayer consists of a single layer containing at least one compound selected from a nitride, a carbide, a nitrided carbide and an oxide containing at least one element selected from periodic group 4A elements, periodic group 5A elements, Al and B, and having a thickness in a range of 100 to 5000 nm.