Railway wheel

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United States of America

PATENT NO 12049102
SERIAL NO

17276510

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Abstract

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Provided is a railway wheel which has excellent toughness even if the C content is as high as 0.80% or more. 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 (3) is less than 0.70 μm:

description='In-line Formulae' end='lead'W=½×(P/2−((P/2)2−4A)1/2)  (3)description='In-line Formulae' end='tail'

    where, in Formula (3), A is an area (μm2) of the pro-eutectoid cementite, and P is a circumference length (μm) of the pro-eutectoid cementite.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATIONCHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kubota, Manabu Tokyo, JP 82 247
Maejima, Taketo Tokyo, JP 10 8

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