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:
Dec. 31, 2019
Filed:
Jan. 30, 2014
Applicant:
Aisin Takaoka Co., Ltd., Toyota-shi, Aichi, JP;
Inventor:
Ryozo Wada, Toyota, JP;
Assignee:
AISIN TAKAOKA CO., LTD., Toyota-Shi, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/34 (2006.01); C21D 9/46 (2006.01); C21D 1/18 (2006.01); F27D 11/12 (2006.01); C21D 8/02 (2006.01);
U.S. Cl.
CPC ...
C21D 1/34 (2013.01); C21D 1/18 (2013.01); C21D 8/0247 (2013.01); C21D 9/46 (2013.01); F27D 11/12 (2013.01);
Abstract
An infrared heating method comprises: wholly infrared heating a steel sheet uniformly up to a temperature which is A3 point or above; and temperature distribution controlling, wherein, after the wholly infrared heating, partial lowering of a light intensity of infrared rays irradiated toward the steel sheet is performed to provide a first region having a temperature of A3 point or above and a second region having a temperature less than A1 point in the steel sheet.