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:
Mar. 20, 2014
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventors:
Teppei Watanabe, Okazaki, JP;
Atsushi Iwase, Okazaki, JP;
Assignee:
DENSO CORPORATION, Kariya, Aichi-pref., JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 8/26 (2006.01); C21D 6/00 (2006.01); C21D 9/00 (2006.01); C21D 1/06 (2006.01);
U.S. Cl.
CPC ...
C23C 8/26 (2013.01); C21D 1/06 (2013.01); C21D 6/00 (2013.01); C21D 6/002 (2013.01); C21D 9/0062 (2013.01); C21D 2211/005 (2013.01);
Abstract
In a method for manufacturing a ferritic stainless steel product, a ferritic stainless steel object is heated in an inert gas atmosphere including nitrogen gas in a heating furnace at a nitriding temperature higher than or equal to a transformation temperature so as to form a nitrided layer on a surface of the ferritic stainless steel object. Moreover, the nitriding temperature is set lower than 1100° C. during the heating. The heating of the ferritic stainless steel object is performed in a state where a solid carbon exists inside the heating furnace.