Railway wheel
AssigneeNippon Steel Corporation
InventorManabu Kubota
Life of this patent
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Abstract
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.
Claims4
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%.
Dependencies are inferred from the claim text.