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:
Jul. 19, 2016
Filed:
Mar. 05, 2012
Masaki Kaizuka, Kobe, JP;
Mutsuhisa Nagahama, Kobe, JP;
Masaki Shimamoto, Kobe, JP;
Tomoko Sugimura, Kobe, JP;
Masaki Kaizuka, Kobe, JP;
Mutsuhisa Nagahama, Kobe, JP;
Masaki Shimamoto, Kobe, JP;
Tomoko Sugimura, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
Bearing steel material according to the present invention has: a properly adjusted chemical composition; an average chemical composition of oxide-inclusions which comprises 10 to 45% of CaO, 20 to 45% of AlO, 30 to 50% of SiO, up to 15% (exclusive of 0) of MnO, and 3 to 10% of MgO, with the balance being unavoidable impurities; a maximum major axis diameter of the oxide inclusions in a longitudinal section of the steel material of 20 μm or less; and a spheroidal cementite structure.