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:
Feb. 11, 2020
Filed:
Sep. 27, 2017
Applicants:
Ihi Corporation, Tokyo, JP;
Ihi Machinery and Furnace Co., Ltd., Tokyo, JP;
Inventor:
Kazuhiko Katsumata, Inuyama, JP;
Assignees:
IHI CORPORATION, Tokyo, JP;
IHI MACHINERY AND FURNACE CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/06 (2006.01); C21D 1/76 (2006.01); C23C 8/26 (2006.01); C22C 38/00 (2006.01); C23C 8/22 (2006.01); C23C 8/32 (2006.01); C23C 8/80 (2006.01); F27D 17/00 (2006.01);
U.S. Cl.
CPC ...
C21D 1/06 (2013.01); C21D 1/76 (2013.01); C22C 38/001 (2013.01); C23C 8/22 (2013.01); C23C 8/26 (2013.01); C23C 8/32 (2013.01); C23C 8/80 (2013.01); F27D 17/003 (2013.01); F27D 17/004 (2013.01); F27D 17/008 (2013.01);
Abstract
The present disclosure is characterized by inexpensively treating an ammonia gas contained in an exhaust gas after nitriding without performing combustion, adsorption using an adsorption agent, or the like. A vacuum carburizing device of the present disclosure includes a heating furnace which heats a workpiece, an ammonia gas supply device which supplies an ammonia gas and nitrides the workpiece to the heating furnace, and a thermal decomposition furnace which thermally decomposes the ammonia gas discharged from the heating furnace after nitriding.