Hard alloy and cutting tool
US-2018036806-A1 · Feb 8, 2018 · US
Hard material and cutting tool
US11214853B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11214853-B2 |
| Application number | US-201716324919-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 29, 2017 |
| Priority date | Aug 22, 2016 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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- Title
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Abstract
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A hard material includes a first hard phase containing titanium carbonitride as a major constituent and a binder phase containing an iron group element as a major constituent. In any surface or cross-section of the hard material, the grain size D50 at a cumulative percentage of 50% of a grain size distribution by area of the first hard phase is 1.0 μm or more, and the average aspect ratio of first hard phase particles having grain sizes larger than or equal to D50 is 2.0 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A hard material comprising a first hard phase substantially composed only of titanium carbonitride and a binder phase containing an iron group element as a major constituent, wherein, in any surface or cross-section of the hard material, a grain size D50 at a cumulative percentage of 50% of a grain size distribution by area of the first hard phase is 1.0 μm or more, and an average aspect ratio of first hard phase particles having grain sizes larger than or equal to D50 is 2.0 or less. 2. The hard material according to claim 1 , wherein, in the surface or cross-section, a grain size D20 at a cumulative percentage of 20% of the grain size distribution by area of the first hard phase is 0.7 μm or more. 3. The hard material according to claim 1 , wherein an area fraction of the first hard phase in the surface or cross-section is 30% or more. 4. The hard material according to claim 1 , further comprising a second hard phase consisting of one or more of carbides, nitrides, carbonitrides, and solid solutions thereof containing one or more metal elements selected from elements in groups 4, 5, and 6 of the periodic table (excluding titanium carbonitride). 5. A cutting tool comprising the hard material according to claim 1 as a substrate. 6. The cutting tool according to claim 5 , wherein the cutting tool has a hard coating on at least a portion of a surface of the substrate.
Assignees
Inventors
Classifications
comprising a particular metallic binder · CPC title
Cutting tools, earth boring or grinding tool other than table ware · CPC title
Carbonitrides · CPC title
Coatings · CPC title
of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title
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- What does patent US11214853B2 cover?
- A hard material includes a first hard phase containing titanium carbonitride as a major constituent and a binder phase containing an iron group element as a major constituent. In any surface or cross-section of the hard material, the grain size D50 at a cumulative percentage of 50% of a grain size distribution by area of the first hard phase is 1.0 μm or more, and the average aspect ratio of fi…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification C22C29/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 04 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).