Railway wheel
AssigneeNippon Steel Corporation
InventorsTaketo MAEJIMA, Manabu KUBOTA
Life of this patent
Estimating the term…
Loading patent…
AssigneeNippon Steel Corporation
InventorsTaketo MAEJIMA, Manabu KUBOTA
Estimating the term…
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.
A railway wheel, comprising:
A railway wheel comprising:
Dependencies are inferred from the claim text.