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:
Nov. 25, 2014
Filed:
Apr. 08, 2008
Toshiyuki Morita, Nagoya, JP;
Kouji Ohbayashi, Anjo, JP;
Masaki Kuwabara, Anjo, JP;
Taro Matsukawa, Anjo, JP;
Yutaka Eto, Anjo, JP;
Kohki Mizuno, Anjo, JP;
Toshiyuki Morita, Nagoya, JP;
Kouji Ohbayashi, Anjo, JP;
Masaki Kuwabara, Anjo, JP;
Taro Matsukawa, Anjo, JP;
Yutaka Eto, Anjo, JP;
Kohki Mizuno, Anjo, JP;
Daido Tokushuko Kabushiki Kaisha, Nagoya, Aichi, JP;
Aisin Aw Co., Ltd., Anjo-Shi, Aichi, JP;
Abstract
The present invention relates to a mechanical part, which is obtained by: processing a steel into a shape of a part, the steel having an alloy composition containing, by weight percent, C: 0.10 to 0.30%, Si: 0.50 to 3.00%, Mn: 0.30 to 3.00%, P: 0.030% or less, S: 0.030% or less, Cu: 0.01 to 1.00%, Ni: 0.01 to 3.00%, Cr: 0.20 to 1.00%, Al: 0.20% or less, N: 0.05% or less, and the remainder of Fe and inevitable impurities, and the alloy composition satisfying the following condition:[Si %]+[Ni %]+[Cu %]−[Cr %]>0.50,in which [Si %], [Ni %], [Cu %] and [Cr %] represent the concentration of Si, the concentration of Ni, the concentration of Cu and the concentration of Cr in the alloy composition, respectively; subjecting the steel to a carburizing treatment in a vacuum, followed by gradually cooling the steel; and subsequently subjecting the steel to a high-frequency hardening to thereby harden a surface of the steel.