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.:
Date of Patent:
Sep. 22, 2026
Filed:
Mar. 14, 2022
Nippon Steel Corporation, Tokyo, JP;
Ryuta Kurosaka, Tokyo, JP;
Takanori Kato, Tokyo, JP;
Taizo Makino, Chiyoda-ku, JP;
Yuichiro Yamamoto, Tokyo, JP;
Naomichi Tsuji, Tokyo, JP;
Naruo Miyabe, Tokyo, JP;
Taketo Maejima, Tokyo, JP;
Taro Osaka, Tokyo, JP;
Katsutoshi Tatebe, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A railway wheel that is capable of suppressing the propagation of cracks is provided. A railway wheel according to the present disclosure includes a hub part, a rim part including a tread and a flange, and a web part. In the railway wheel, in an outer layer of the rim part that includes the tread, an elastic limit σis 430 MPa or more, an initial kinematic hardening coefficient C is 130 GPa or more, and a kinematic hardening coefficient reduction ratio γ is 400 or less. The initial kinematic hardening coefficient C and the kinematic hardening coefficient reduction ratio γ satisfy Formula (1).