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:
May. 27, 2014
Filed:
Apr. 08, 2011
Koji Obayashi, Toyoake, JP;
Keita Taguchi, Agui, JP;
Susumu Kato, Anjyo, JP;
Shuji Kozawa, Muroran, JP;
Manabu Kubota, Muroran, JP;
Yuji Adachi, Tokai, JP;
Hirokazu Sato, Tokai, JP;
Koji Obayashi, Toyoake, JP;
Keita Taguchi, Agui, JP;
Susumu Kato, Anjyo, JP;
Shuji Kozawa, Muroran, JP;
Manabu Kubota, Muroran, JP;
Yuji Adachi, Tokai, JP;
Hirokazu Sato, Tokai, JP;
Aisin AW Co., Ltd., Anjo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A method of manufacturing a gear, and the resulting gear, the method resulting such that the surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer. The gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities.