The chemical composition of the railway wheel of the present embodiment consists of: in mass %, C: 0.80 to 1.60%, Si: 1.00% or less, Mn: 0.10 to 1.25%, P: 0.050% or less, S: 0.030% or less, Al: 0.010 to 0.650%, and N: 0.0030 to 0.0200%, with the balance being Fe and impurities, and wherein, in a microstructure of the web part of the railway wheel, an area fraction of pearlite is 85.0% or more, an area fraction of pro-eutectoid cementite is 0.90 to 15.00%, and an average value of a width W of the pro-eutectoid cementite defined by Formula (1) is less than 0.70 μm:W=½×(P/2−((P/2)2−4A)1/2) (1)where, in Formula (1), A is an area (μm2) of the pro-eutectoid cementite, and P is a circumference length (μm) of the pro-eutectoid cementite.
RAILWAY WHEEL
2022-02-03
Patent
Elektronische Ressource
Englisch