Patent ID: 11890894
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
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).