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. 18, 2009
Filed:
Mar. 28, 2002
Hisashi Ebihara, Tokyo, JP;
Jun Takahashi, Tokyo, JP;
Fumitaka Abukawa, Tokyo, JP;
Keiji Yokose, Tokyo, JP;
Hidetoshi Juryozawa, Tokyo, JP;
Hisashi Ebihara, Tokyo, JP;
Jun Takahashi, Tokyo, JP;
Fumitaka Abukawa, Tokyo, JP;
Keiji Yokose, Tokyo, JP;
Hidetoshi Juryozawa, Tokyo, JP;
Dowa Mining Co., Ltd., Tokyo, JP;
Abstract
The invention provides a carburization treatment method in which the carburization treatment is conducted under a condition where an atmosphere within the furnace is maintained at a high carbon potential which is slightly blow a carbon solid solubility. Preferably, the internal pressure within the furnace is kept at 0.1 to 101 kPa, the hydrocarbon gas is one, two or more than two kinds of gases selected from the group consisting of CH, CH, CH, CH, CH, CHand CH, while the oxidative gas is an air, an Ogas, or COgas.