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:
Dec. 17, 2013
Filed:
May. 31, 2010
Katsuhisa Yamauchi, Chiba, JP;
Mitsuyuki Fujisawa, Chiba, JP;
Yasushi Kato, Tokyo, JP;
Hiroki Ota, Chiba, JP;
Hideya Furusawa, Chiba, JP;
Takumi Ujiro, Chiba, JP;
Katsuhisa Yamauchi, Chiba, JP;
Mitsuyuki Fujisawa, Chiba, JP;
Yasushi Kato, Tokyo, JP;
Hiroki Ota, Chiba, JP;
Hideya Furusawa, Chiba, JP;
Takumi Ujiro, Chiba, JP;
JFE Steel Corporation, , JP;
Abstract
A steel sheet for a brake disc contains, on a mass percent basis, 0.02% or more and less than 0.10% C, 0.6% or less Si, more than 0.5% and 2.0% or less Mn, 0.06% or less P, 0.01% or less S, 0.05% or less Al, 11.0% to 13.5% Cr, 0.01% to 0.30% Ni, 0.10% to 0.60% Nb, 0.03% or more and less than 0.10% N, more than 0.0010% and 0.0060% or less B, and the balance being Fe and incidental impurities, and the steel sheet after quenching has a hardness of 32 HRC to 40 HRC on a Rockwell hardness scale C (HRC).