Coated tool and cutting tool
AssigneeKYOCERA Corporation
InventorsMasahiro Waki, Risa Koda
Life of this patent
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Abstract
A coated tool in a non-limiting embodiment of the present disclosure includes a base composed of WC-based cemented carbide including a WC particle and a binding phase, and a diamond film located on the base. In a cross section orthogonal to a surface of the coated tool, the base has a lower content of the binding phase in a surface of the base than a midportion of the base. In an interface region between the base and the diamond film, a WC particle located away from the base is an isolated WC particle, and the number of the isolated WC particle present per interface length of 10 μm is 4 or less. A cutting tool in a non-limiting embodiment of the present disclosure includes the above coated tool.
Claims6
A coated tool, comprising:
- a base composed of WC-based cemented carbide comprising a WC particle and a binding phase;
- and
- a diamond film located on the base, wherein
- the base comprises
- a first part, and
- a second part located closer to a midportion of the base than the first part,
- the first part has a content of the binding phase lower than the second part,
- in a cross section orthogonal to a surface of the coated tool in an interface region between the base and the diamond film,
- a further WC particle located away from the base is an isolated WC particle, and
- a number of the isolated WC particle present per interface length of 10 μm is 4 or less, and
- a length of the first part from the interface region to the second part is above 2.0 μm and less than or equal to 5.0 μm.
A cutting tool, comprising:
- a coated tool including
- a base composed of WC-based cemented carbide comprising a WC particle and a binding phase;
- and
- a diamond film located on the base, wherein
- the base comprises
- a first part, and
- a second part located closer to a midportion of the base than the first part,
- the first part has a content of the binding phase lower than the second part,
- in a cross section orthogonal to a surface of the coated tool in an interface region between the base and the diamond film,
- a further WC particle located away from the base is an isolated WC particle, and
- a number of the isolated WC particle present per interface length of 10 μm is 4 or less, and
- a length of the first part from the interface region to the second part is above 2.0 μm and less than or equal to 5.0 μm.
Dependencies are inferred from the claim text.