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:
Mar. 14, 2017
Filed:
Apr. 28, 2014
Hiroki Masuda, Saitama, JP;
Hideki Matsuda, Saitama, JP;
Ayumi Yamazaki, Aichi, JP;
Shinichiro Kato, Aichi, JP;
Takahiro Miyazaki, Aichi, JP;
Hiroki Masuda, Saitama, JP;
Hideki Matsuda, Saitama, JP;
Ayumi Yamazaki, Aichi, JP;
Shinichiro Kato, Aichi, JP;
Takahiro Miyazaki, Aichi, JP;
DAIDO STEEL CO., LTD., Aichi, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
Provided is a method of manufacturing a nitrocarburized crankshaft which is obtained by subjecting a bainitic microalloyed steel to a forging and a machining, and further subjecting the bainitic microalloyed steel to at least a strain releasing heat treatment and a subsequent nitrocarburizing treatment, the bainitic microalloyed steel containing, as essentially added elements, in terms of mass %: 0.10% to 0.40% of C; 0.10% to 1.0% of Si; 1.0% to 2.0% of Mn; 0.05% to 0.40% of Mo; and 0.05% to 0.40% of V, and the bainitic microalloyed steel optionally further containing, as arbitrarily added elements, in terms of mass %: 0.01% to 0.1% of S; 0.005% to 0.2% of Ti; 0.001% to 0.03% of Al; 0.50% or less of Cr; 0.5% or less of Cu; and 0.5% or less of Ni, with the balance being Fe and unavoidable impurities.