Railway wheel
AssigneeNippon Steel Corporation
InventorsTaketo MAEJIMA, Manabu KUBOTA
Life of this patent
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Abstract
A railway wheel in which formation of a quenched layer can be suppressed in the production process is provided. The railway wheel according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.80 to 1.15%, Si: 1.00% or less, Mn: 0.10 to 1.20%, P: 0.050% or less, S: 0.030% or less, Al: 0.005 to 0.190%, 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. In the microstructure of a rim part of the railway wheel, an area fraction of pro-eutectoid cementite is 0.1 to 1.5% and an area fraction of pearlite is 95.0% or more.
Claims4
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:
- 1.00% or less,
- Mn:
- 0.10 to 1.20%,
- P:
- 0.050% or less,
- S:
- 0.030% or less,
- Al:
- 0.005 to 0.190%,
- 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
- in a microstructure of the rim part of the railway wheel,
- an area fraction of pro-eutectoid cementite is 0.1 to 1.5%, and
- an area fraction of pearlite is 95.0% or more.
Dependencies are inferred from the claim text.