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:
Jun. 05, 2018
Filed:
Feb. 10, 2017
Dowa Thermotech Co., Ltd., Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Yuichiro Shimizu, Tokyo, JP;
Atsushi Kobayashi, Saitama, JP;
Susumu Maeda, Saitama, JP;
Masao Kanayama, Tokyo, JP;
Kiyotaka Akimoto, Tokyo, JP;
DOWA THERMOTECH CO., LTD., Tokyo, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
A manufacturing method of a nitrided steel member and the nitrided steel member include: performing a nitriding treatment on a steel member made of a carbon steel or an alloy steel in an atmosphere of a nitriding treatment gas in which when the total pressure is set to 1, a partial pressure ratio of NHgas is set to 0.08 to 0.34, a partial pressure ratio of Hgas is set to 0.54 to 0.82, and a partial pressure ratio of Ngas is set to 0.09 to 0.18, at a flow speed of the nitriding treatment gas set to 1 m/s or more, at 500 to 620° C.; and thereby, forming an iron nitride compound layer having a thickness of 2 to 17 μm on a surface of the steel member.