Rail vehicle axle

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United States of America Patent

PATENT NO 12000028
APP PUB NO 20180245189A1
SERIAL NO

15751020

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a rail vehicle axle having an excellent fatigue limit and notch factor. A rail vehicle axle according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.20 to 0.35%, Si: 0.20 to 0.65%, Mn: 0.40 to 1.20%, P: 0.020% or less, S: 0.020% or less, Sn: 0.07 to 0.40%, N: 0.0200% or less, Cu: 0 to 0.30%, Ni: 0 to 0.30%, Cr: 0 to 0.30%, Mo: 0 to 0.08%, Al: 0 to 0.100%, V: 0 to 0.060%, and Ti: 0 to 0.020%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2):

description='In-line Formulae' end='lead'0.58≤C+Si/8+Mn/5+Cu/10+Cr/4+V≤0.67  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'Si+0.9Cr≥0.50  (2)description='In-line Formulae' end='tail'

    where, each element symbol in Formulae (1) and (2) is substituted by the content (mass %) of a corresponding element.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kamimura, Takayuki Takarazuka, JP 15 45
Makino, Taizo Kobe, JP 20 67
Mizui, Naomitsu Amagasaki, JP 5 28
Sugae, Kiyonobu Nishinomiya, JP 1 1
Takeshita, Yukiteru Nishinomiya, JP 4 11
Wakasu, Yutaka Boalsburg, US 13 1002
Yamamoto, Yuichiro Amagasaki, JP 49 231

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