Sintered bearing and manufacturing process therefor
US-2016223016-A1 · Aug 4, 2016 · US
Alloy steel powder for powder metallurgy, and sintered body
US10207328B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10207328-B2 |
| Application number | US-201515529125-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 24, 2015 |
| Priority date | Dec 5, 2014 |
| Publication date | Feb 19, 2019 |
| Grant date | Feb 19, 2019 |
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Abstract
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An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, wherein an iron-based powder has a mean particle size of 30 μm to 120 μm, and a Cu powder has a mean particle size of 25 μm or less. Despite the alloy steel powder for powder metallurgy having a chemical composition not containing Ni, a part produced by sintering a press formed part of the powder and further carburizing-quenching-tempering the sintered part has mechanical properties of at least as high tensile strength, toughness, and sintered density as a Ni-added part.
First claim
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The invention claimed is: 1. An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy, comprising: a partial diffusion alloy steel powder obtained by diffusionally adhering Mo to an iron-based powder; a Cu powder; and a graphite powder, wherein the partial diffusion alloy steel powder has a chemical composition consisting of Mo, Fe, and incidental impurities, the alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, and the iron-based powder has a mean particle size of 30 μm to 120 μm, and the Cu powder has a flat shape and satisfies a relation L≤−2d+50 where d is a thickness of the Cu powder in μm and L is a diameter in a major axis of the Cu powder in μm. 2. An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy, comprising: a partial diffusion alloy steel powder obtained by diffusionally adhering Mo to an iron-based powder; a Cu powder; and a graphite powder, wherein the partial diffusion alloy steel powder has a chemical composition consisting of Mo, Fe, and incidental impurities, the alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, and the iron-based powder has a mean particle size of 30 μm to 120 μm, and the Cu powder is a mixed powder of a Cu powder having a mean particle size of 25 μm or less and a Cu powder having a flat shape and satisfying a relation L≤−2d+50 where d is a thickness of the Cu powder in μm and L is diameter in a major axis of the Cu powder in μm. 3. A sintered body produced using the alloy steel powder for powder metallurgy according to claim 1 as a material. 4. A sintered body produced using the alloy steel powder for powder metallurgy according to claim 2 as a material.
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Classifications
Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title
Flake-like particles · CPC title
Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title
Metallic powder characterised by the shape of the particles (nanosized particles B22F1/054) · CPC title
characterised by a mixture of particles of different sizes or by the particle size distribution · CPC title
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- What does patent US10207328B2 cover?
- An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, wherein an iron-based powder has a mean particle size of 30 μm to 120 μm, and a Cu powder has a mean particle size of 25 μm or less. Despite the alloy ste…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C33/0264. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 19 2019 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).