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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12000028 B1

PDFFull Text
Date of Patent:
Jun. 04, 2024

Filed:

Aug. 17, 2016

Rail vehicle axle

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Taizo Makino, Kobe, JP;

Takayuki Kamimura, Takarazuka, JP;

Yuichiro Yamamoto, Amagasaki, JP;

Yutaka Wakasu, Boalsburg, PA (US);

Kiyonobu Sugae, Nishinomiya, JP;

Yukiteru Takeshita, Nishinomiya, JP;

Naomitsu Mizui, Amagasaki, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Adil A Siddiqui

Int. Cl.
CPC ...
C22C 38/50 (2006.01); B61F 5/50 (2006.01); C21D 1/28 (2006.01); C21D 6/00 (2006.01); C21D 8/06 (2006.01); C21D 9/08 (2006.01); C21D 9/28 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); F16C 3/02 (2006.01);
U.S. Cl.
CPC ...
C22C 38/50 (2013.01); B61F 5/50 (2013.01); C21D 1/28 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/065 (2013.01); C21D 9/08 (2013.01); C21D 9/28 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); F16C 3/02 (2013.01); F16C 2204/62 (2013.01); F16C 2326/10 (2013.01);
Abstract

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):0.58≤C+Si/8+Mn/5+Cu/10+Cr/4+V≤0.67  (1)Si+0.9Cr≥0.50  (2)

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