Surface-coated cutting tool with excellent adhesion-induced chipping resistance and peel resistance
US-2019176242-A1 · Jun 13, 2019 · US
Cutting tool
US11207736B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11207736-B2 |
| Application number | US-202015734270-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2020 |
| Priority date | Apr 10, 2020 |
| Publication date | Dec 28, 2021 |
| Grant date | Dec 28, 2021 |
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Abstract
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Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when P N1 atomic % represents an atomic ratio of the nitrogen in an interface between the intermediate layer and the alumina layer, and P N2 atomic % represents an atomic ratio of the nitrogen at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P N1 /P N2 of the P N1 to the P N2 being more than or equal to 1.03.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cutting tool comprising a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed of a compound made of titanium, carbon, oxygen, and nitrogen, the intermediate layer having a thickness of more than 1 μm, when P N1 atomic % represents an atomic ratio of the nitrogen in an interface between the intermediate layer and the alumina layer, and P N2 atomic % represents an atomic ratio of the nitrogen at a point A away from the interface by 1 μm on a side of the intermediate layer, a ratio P N1 /P N2 of the P N1 to the P N2 being more than or equal to 1.03. 2. The cutting tool according to claim 1 , wherein the P N1 is more than or equal to 8 atomic % and less than or equal to 35 atomic %. 3. The cutting tool according to claim 1 , wherein, when P O1 atomic % represents an atomic ratio of the oxygen in the interface, and P O2 atomic % represents an atomic ratio of the oxygen at the point A, a ratio P O1 /P O2 of the P O1 to the P O2 is more than or equal to 0.9 and less than 1. 4. The cutting tool according to claim 1 , wherein, when P C1 atomic % represents an atomic ratio of the carbon in the interface, and P C2 atomic % represents an atomic ratio of the carbon at the point A, a ratio P C1 /P C2 of the P C1 to the P C2 is more than or equal to 0.9 and less than 1. 5. The cutting tool according to claim 1 , wherein the intermediate layer has a thickness of more than 1 μm and less than or equal to 3 μm. 6. The cutting tool according to claim 1 , wherein an underlying layer is further provided between the base material and the coating layer. 7. The cutting tool according to claim 1 , wherein a surface layer is further provided on the coating layer.
Assignees
Inventors
Classifications
Carbonitrides · CPC title
Titanium · CPC title
Graded interfaces · CPC title
- C23C16/403Primary
of aluminium, magnesium or beryllium · CPC title
- B23B27/148Primary
Composition of the cutting inserts · CPC title
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- What does patent US11207736B2 cover?
- Provided is a cutting tool including a base material and a coating layer provided on the base material, the coating layer including a titanium carbonitride layer provided on the base material, an intermediate layer provided on the titanium carbonitride layer in contact therewith, and an alumina layer provided on the intermediate layer in contact therewith, the intermediate layer being composed …
- Who is the assignee on this patent?
- Sumitomo Electric Hardmetal Corp
- What technology area does this patent fall under?
- Primary CPC classification C23C16/403. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 28 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).