Method for producing railway wheel and railway wheel
US-11761053-B2 · Sep 19, 2023 · US
Railway wheel
US11890894B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11890894-B2 |
| Application number | US-201917276209-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 27, 2019 |
| Priority date | Sep 28, 2018 |
| Publication date | Feb 6, 2024 |
| Grant date | Feb 6, 2024 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.80 to 1.15%, Si: 0.45% or less, Mn: 0.10 to 0.85%, P: 0.050% or less, S: 0.030% or less, Al: 0.200 to 1.500%, N: 0.0200% or less, Nb: 0.005 to 0.050%, Cr: 0 to 0.25%, and V: 0 to 0.12%, with the balance being Fe and impurities, wherein at least in the microstructure of the rim part and the web part, the amount of pro-eutectoid cementite defined by Formula (1) is 2.00 pieces/100 μm or less:Amount of pro-eutectoid cementite(pieces/100 μm)=a total sum of the number of pieces of pro-eutectoid cementite which intersect with two diagonal lines in a square visual field of 200 μm×200 μm/(5.66×100 μm)×100 (1).
First claim
Opening claim text (preview).
The invention claimed is: 1. A railway wheel, comprising: a rim part, a hub part, and a web part which is disposed between the rim part and the hub part and is linked to the rim part and the hub part, wherein a chemical composition of the railway wheel consists of: in mass %, C: 0.80 to 1.15%, Si: 0.45% or less, Mn: 0.10 to 0.85%, P: 0.050% or less, S: 0.030% or less, Al: 0.200 to 1.500%, N: 0.0200% or less, Nb: 0.005 to 0.050%, Cr: 0 to 0.25%, and V: 0 to 0.12%, with the balance being Fe and impurities, and wherein at least in microstructures of the rim part and the web part among the rim part, the hub part, and the web part of the railway wheel, an amount of pro-eutectoid cementite defined by Formula (1) is 2.00 pieces/100 μm or less: Amount of pro-eutectoid cementite(pieces/100 μm)=a total sum of the number of pieces of pro-eutectoid cementite which intersect with two diagonal lines in a square visual field of 200 μm×200 μm/(5.66×100 μm)×100 (1). 2. The railway wheel according to claim 1 , wherein in the microstructure of the rim part, the hub part, and the web part of the railway wheel, the amount of pro-eutectoid cementite defined by Formula (1) is 2.00 pieces/100 μm or less. 3. The railway wheel according to claim 1 , wherein the chemical composition contains one or more elements selected from the group consisting of: Cr: 0.02 to 0.25%, and V: 0.02 to 0.12%. 4. The railway wheel according to claim 2 , wherein the chemical composition contains one or more elements selected from the group consisting of: Cr: 0.02 to 0.25%, and V: 0.02 to 0.12%.
Assignees
Inventors
Classifications
- B60B17/0006Primary
Construction of wheel bodies, e.g. disc wheels (B60B17/0003 takes precedence) · CPC title
containing manganese · CPC title
containing aluminium · CPC title
with vanadium · CPC title
with niobium or tantalum · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11890894B2 cover?
- The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.80 to 1.15%, Si: 0.45% or less, Mn: 0.10 to 0.85%, P: 0.050% or less, S: 0.030% or less, Al: 0.200 to 1.500%, N: 0.0200% or less, Nb: 0.005 to 0.050%, Cr: 0 to 0.25%, and V: 0 to 0.12%, with the balance being Fe and impurities, wherein at least in the microstructure of the rim part an…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B60B17/0006. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 06 2024 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).