Erosion resistant hard composite materials
US-2015354283-A1 · Dec 10, 2015 · US
Cubic boron nitride sintered material
US11518718B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11518718-B2 |
| Application number | US-202017626051-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 17, 2020 |
| Priority date | Jul 18, 2019 |
| Publication date | Dec 6, 2022 |
| Grant date | Dec 6, 2022 |
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Abstract
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A cubic boron nitride sintered material includes: 20 t to 80 volume % of cBN grains; and 20 to 80 volume % of a binder phase, wherein the binder phase includes first binder grains and second binder grains, in each of the first binder grains, a ratio of the number of atoms of the first metal element to a total of the number of atoms of the titanium and the first metal element is more than or equal to 0.01% and less than 10%, in each of the second binder grains, the ratio is more than or equal to 10% and less than or equal to 80%, and an average grain size of the second binder grains is more than or equal to 0.2 μm and less than or equal to 1 μm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cubic boron nitride sintered material comprising: more than or equal to 20 volume % and less than or equal to 80 volume % of cubic boron nitride grains; and more than or equal to 20 volume % and less than or equal to 80 volume % of a binder phase, wherein the binder phase includes first binder grains and second binder grains, each of the first binder grains and the second binder grains includes one compound composed of titanium, at least one first metal element selected from a group consisting of zirconium, hafnium, a group 5 element, a group 6 element in a periodic table, and aluminum, and one or both of nitrogen and carbon, in each of the first binder grains, a ratio of the number of atoms of the first metal element to a total of the number of atoms of the titanium and the number of atoms of the first metal element is more than or equal to 0.01% and less than 10%, in each of the second binder grains, a ratio of the number of atoms of the first metal element to a total of the number of atoms of the titanium and the number of atoms of the first metal element is more than or equal to 10% and less than or equal to 80%, and an average grain size of the second binder grains is more than or equal to 0.2 μm and less than or equal to 1 μm, wherein a ratio of a mass of the first binder grains to a total mass of the first binder grains and the second binder grains is more than or equal to 10% and less than or equal to 95%. 2. The cubic boron nitride sintered material according to claim 1 , wherein the average grain size of the second binder grains is more than or equal to 0.25 μm and less than or equal to 0.7 μm. 3. The cubic boron nitride sintered material according to claim 1 , wherein a ratio of a mass of the first binder grains to a total mass of the first binder grains and the second binder grains is more than or equal to 50% and less than or equal to 80%. 4. The cubic boron nitride sintered material according to claim 1 , wherein the first metal element consists of at least one metal element selected from a group consisting of zirconium, hafnium, niobium, tantalum, molybdenum, and tungsten. 5. The cubic boron nitride sintered material according to claim 1 , wherein the first metal element consists of one or both of zirconium and niobium. 6. The cubic boron nitride sintered material according to claim 1 , wherein a content ratio of the cubic boron nitride grains is more than or equal to 35 volume % and less than or equal to 75 volume %.
Assignees
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Classifications
Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate · CPC title
Carbonitrides, e.g. titanium carbonitride, zirconium carbonitride · CPC title
- C04B35/5831Primary
based on cubic boron nitrides {or Wurtzitic boron nitrides, including crystal structure transformation of powder} · CPC title
Cubic boron nitrides only · CPC title
Boron nitrides · CPC title
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- What does patent US11518718B2 cover?
- A cubic boron nitride sintered material includes: 20 t to 80 volume % of cBN grains; and 20 to 80 volume % of a binder phase, wherein the binder phase includes first binder grains and second binder grains, in each of the first binder grains, a ratio of the number of atoms of the first metal element to a total of the number of atoms of the titanium and the first metal element is more than or equ…
- Who is the assignee on this patent?
- Sumitomo Electric Industries, Sumitomo Electric Hardmetal Corp
- What technology area does this patent fall under?
- Primary CPC classification C04B35/5831. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 06 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).