Coated tool, cutting tool, and method for manufacturing machined product
US-2020122239-A1 · Apr 23, 2020 · US
Cutting tools
US11511353B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11511353-B2 |
| Application number | US-202117439410-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 22, 2021 |
| Priority date | Mar 22, 2021 |
| Publication date | Nov 29, 2022 |
| Grant date | Nov 29, 2022 |
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Abstract
Official abstract text for this publication.
A cutting tool comprising a base material and a coating arranged on the base material; wherein: the coating comprises an α-Al 2 O 3 layer composed of a plurality of α-Al 2 O 3 particles; the average particle diameter a of the α-Al 2 O 3 particles in a first region of the α-Al 2 O 3 layer is 0.10 μm or more and 0.30 μm or less; the average particle diameter b of the α-Al 2 O 3 particles in a second region of the α-Al 2 O 3 layer is 0.30 μm or more and 0.50 μm or less; the average particle diameter c of the α-Al 2 O 3 particles in a third region of the α-Al 2 O 3 layer is 0.30 μm or more and 0.50 μm or less; and the ratio b/a is 1.5 or more and 5.0 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cutting tool comprising a base material and a coating arranged on the base material; wherein: the coating comprises an α-Al 2 O 3 layer; the α-Al 2 O 3 layer is composed of a plurality of α-Al 2 O 3 particles; the α-Al 2 O 3 layer comprises a first region, a second region and a third region; the first region is a region sandwiched between an interface P 1 on the base material side of the α-Al 2 O 3 layer and a virtual surface S 1 that is located at a distance of 0.5 μm from interface P 1 toward the surface side of the coating; the second region is a region sandwiched between virtual surface S 1 and a virtual surface S 2 that is located at a distance of 1.0 μm from virtual surface S 1 toward the surface side of the coating; the third region is a region sandwiched between a surface P 2 of the α-Al 2 O 3 layer or an interface P 3 on the surface side of the coating of the α-Al 2 O 3 layer and a virtual surface S 3 that is located at a distance of 1.0 μm from surface P 2 or from interface P 3 toward the base material side; the average particle diameter a of the α-Al 2 O 3 particles in the first region is 0.10 μm or more and 0.30 μm or less; the average particle diameter b of the α-Al 2 O 3 particles in the second region is 0.30 μm or more and 0.50 μm or less; the average particle diameter c of the α-Al 2 O 3 particles in the third region is 0.30 μm or more and 0.50 μm or less; and the ratio b/a between the average particle diameter b and the average particle diameter a is 1.5 or more and 5.0 or less. 2. The cutting tool according to claim 1 , wherein the average particle diameter c is 0.36 μm or more and 0.44 μm or less. 3. The cutting tool according to claim 1 , wherein the ratio b/a is 1.5 or more and 2.5 or less. 4. The cutting tool according to claim 1 , wherein the average thickness of the α-Al 2 O 3 layer is 3 μm or more and 15 μm or less. 5. The cutting tool according to claim 1 , wherein the α-Al 2 O 3 layer has a TC (0 0 12) of 3 or more in an orientation index TC (hkl).
Assignees
Inventors
Classifications
of aluminium, magnesium or beryllium · CPC title
- C23C28/044Primary
coatings specially adapted for cutting tools or wear applications · CPC title
Coatings · CPC title
on hard metal substrates · CPC title
- B23B27/148Primary
Composition of the cutting inserts · CPC title
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- What does patent US11511353B2 cover?
- A cutting tool comprising a base material and a coating arranged on the base material; wherein: the coating comprises an α-Al 2 O 3 layer composed of a plurality of α-Al 2 O 3 particles; the average particle diameter a of the α-Al 2 O 3 particles in a first region of the α-Al 2 O 3 layer is 0.10 μm or more and 0.30 μm or less; the average particle diameter b of the α-Al 2 O 3 particles in …
- Who is the assignee on this patent?
- Sumitomo Electric Hardmetal Corp
- What technology area does this patent fall under?
- Primary CPC classification C23C28/044. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 29 2022 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).