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US 2014/0227547 A1Published application
Cutting tool
AssigneeKYOCERA Corporation
InventorKou Ri
Life of this patent
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Abstract
A cutting tool including a base, a TiN layer on the base, a TiCN layer on the TiN layer, and an Al2O3 layer on the TiCN layer. The base contains a cemented carbide. The TiN layer and the TiCN layer contain Nb. A Nb content in the TiCN layer at a middle portion of the TiCN layer in a thickness direction is 0.1% by mass or more, and the Nb content in the Al2O3 layer at a middle portion of the Al2O3 layer in the thickness direction is 0.05% by mass or less.
Claims6
A cutting tool, comprising:
- a base composed of a cemented carbide;
- a TiN layer on the base, said TiN layer containing Nb;
- a TiCN layer on the TiN layer, said TiCN layer containing Nb;
- and
- an Al2O3 layer on the TiCN layer, said Al2O3 layer containing Nb;
- wherein
- a Nb content of the TiCN layer at a middle thereof in a thickness direction is 0.1% by mass or more, and
- the Nb content of the Al2O3 layer at a middle thereof in the thickness direction is 0.05% by mass or less.
5 more elements
Dependencies are inferred from the claim text.