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:
Aug. 22, 2017
Filed:
Jan. 31, 2012
Applicants:
Jun Yoshida, Ichikawa, JP;
Daisuke Kaneko, Yokohama, JP;
Noriyuki Iwata, Ayase, JP;
Inventors:
Assignee:
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 1/02 (2006.01); C21D 7/13 (2006.01); C22C 38/00 (2006.01); C22C 38/38 (2006.01); C22C 38/60 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); B21K 1/08 (2006.01); C21D 9/30 (2006.01);
U.S. Cl.
CPC ...
C21D 7/13 (2013.01); B21K 1/08 (2013.01); C21D 1/02 (2013.01); C21D 9/30 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/38 (2013.01); C22C 38/42 (2013.01); C22C 38/60 (2013.01); C21D 2211/005 (2013.01); C21D 2211/009 (2013.01); Y10T 29/49286 (2015.01);
Abstract
A forging process is conducted in a temperature range of 350-600° C. on at least a portion that is required to have a fatigue strength in an intermediate forged product having a ferrite and pearlite texture obtained by conducting a hot forging on a steel in which N is not greater than an amount at which N is unavoidably dissolved as a solid, thereby improving strength of the portion that is required to have a fatigue strength. With this, there is provided a forged product having a good strength and a low price.