Steel for rails and a method of manufacturing of a rail thereof
US-2024002966-A1 · Jan 4, 2024 · US
Railway wheel
US11110741B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11110741-B2 |
| Application number | US-201716074137-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 28, 2017 |
| Priority date | Mar 2, 2016 |
| Publication date | Sep 7, 2021 |
| Grant date | Sep 7, 2021 |
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Abstract
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To provide a railway wheel which is excellent in corrosion fatigue resistance. The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Mo: 0 to 0.20%, V: 0 to 0.20%, Nb: 0 to 0.030%, and Ti: 0 to 0.030%, with the balance being Fe and impurities. A plate portion has a matrix structure composed of pearlite.
First claim
Opening claim text (preview).
The invention claimed is: 1. A railway wheel, comprising a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Mo: 0 to 0.20%, V: 0 to 0.20%, Nb: 0 to 0.030%, and Ti: 0 to 0.030%, with the balance being Fe and impurities, wherein in a matrix of a plate portion of the railway wheel, an area fraction of pearlite is not less than 95%. 2. The railway wheel according to claim 1 , wherein the chemical composition contains at least one element selected from the group consisting of Cu: 0.02 to 0.20% and Ni: 0.02 to 0.20%. 3. The railway wheel according to claim 2 , wherein the chemical composition contains at least one element selected from the group consisting of Mo: 0.005 to 0.20%, V: 0.005 to 0.20%, Nb: 0.010 to 0.030%, and Ti: 0.010 to 0.030%. 4. The railway wheel according to claim 1 , wherein the chemical composition contains at least one element selected from the group consisting of Mo: 0.005 to 0.20%, V: 0.005 to 0.20%, Nb: 0.010 to 0.030%, and Ti: 0.010 to 0.030%.
Assignees
Inventors
Classifications
Corrosions · CPC title
with nickel · CPC title
Both containing 0.01-1.7% carbon [i.e., steel] · CPC title
containing silicon · CPC title
containing tungsten, tantalum, molybdenum, vanadium, or niobium · CPC title
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Frequently asked questions
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- What does patent US11110741B2 cover?
- To provide a railway wheel which is excellent in corrosion fatigue resistance. The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0…
- Who is the assignee on this patent?
- Nippon Steel & Sumitomo Metal Corp, Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C21D9/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 07 2021 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).