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US-9028573-B2 · May 12, 2015 · US
Polycrystalline abrasive grain and grinding wheel including same
US2021237227A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021237227-A1 |
| Application number | US-201917050690-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 24, 2019 |
| Priority date | Apr 27, 2018 |
| Publication date | Aug 5, 2021 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
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A polycrystalline abrasive grain includes: a plurality of cBN particles; and a binder that binds the plurality of cBN particles, wherein the binder includes at least one of nitride, carbide, and carbonitride of one selected from a group consisting of a group 4a metal, a group 5a metal, and a group 6a metal in a periodic table, and a content of the binder in the polycrystalline abrasive grain is more than or equal to 5 volume % and less than or equal to 50 volume %.
First claim
Opening claim text (preview).
1 : A polycrystalline abrasive grain comprising: a plurality of high-pressure phase type boron nitride particles; and a binder that binds the plurality of high-pressure phase type boron nitride particles, wherein the binder includes at least one of nitride, carbide, and carbonitride of at least one selected from a group consisting of a group 4a metal, a group 5a metal, and a group 6a metal in a periodic table, and a content of the binder in the polycrystalline abrasive grain is more than or equal to 5 volume % and less than or equal to 50 volume %. 2 : The polycrystalline abrasive grain according to claim 1 , wherein the polycrystalline abrasive grain has a first surface formed at an outer surface of the polycrystalline abrasive grain, and at least one recess is formed in the first surface. 3 : The polycrystalline abrasive grain according to claim 2 , wherein a value obtained by dividing a total area of the recess by a total area of the first surface and the recess of the polycrystalline abrasive grain is more than or equal to 0.5 and less than or equal to 0.99. 4 : The polycrystalline abrasive grain according to claim 1 , wherein the binder includes at least one selected from a group consisting of TiN, TiCN, ZrN, HfN, VN, NbCN, TaC, CrN, MoC, and WC. 5 : A grinding wheel comprising the polycrystalline abrasive grain recited in claim 1 .
Assignees
Inventors
Classifications
Abrasive particles per se (preparation of diamond C01B32/25) · CPC title
Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor · CPC title
- B24D3/14Primary
ceramic, i.e. vitrified bondings · CPC title
- B24D3/06Primary
metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} · CPC title
- C09K3/1445Primary
the coating consisting exclusively of metals · CPC title
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- What does patent US2021237227A1 cover?
- A polycrystalline abrasive grain includes: a plurality of cBN particles; and a binder that binds the plurality of cBN particles, wherein the binder includes at least one of nitride, carbide, and carbonitride of one selected from a group consisting of a group 4a metal, a group 5a metal, and a group 6a metal in a periodic table, and a content of the binder in the polycrystalline abrasive grain is…
- Who is the assignee on this patent?
- Sumitomo Electric Industries, Sumitomo Electric Hardmetal Corp, Almt Corp
- What technology area does this patent fall under?
- Primary CPC classification B24D3/14. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Aug 05 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).