Title:
NITRIDED STEEL MEMBER AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2013/157579
Kind Code:
A1
Abstract:
A nitrided steel member produced by forming an iron nitride compound layer on the surface of a steel member having a prescribed composition, wherein: when the surface of the nitrided steel member is measured by X-ray diffraction, the intensity ratio IFe4N(111)/{IFe4N(111) + IFe3N(111)} is 0.5 or more, IFe4N(111) referring to the X-ray diffraction peak intensity assignable to the (111) plane of Fe4N, and IFe3N(111) referring to the X-ray diffraction peak intensity assignable to the (111) plane of Fe3N; the Vickers hardness of the iron nitride compound layer is 900 or less; the Vickers hardness of the base metal at a point located immediately under the iron nitride compound layer is 700 or more; the difference between the Vickers hardness of the iron nitride compound layer and that of the base metal at the point is 150 or less; and the thickness of the iron nitride compound layer is 2 to 17μm.
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Inventors:
SHIMIZU YUICHIRO (JP)
KOBAYASHI ATSUSHI (JP)
MAEDA SUSUMU (JP)
KANAYAMA MASAO (JP)
IMATAKA HIDEKI (JP)
YUYA MASATO (JP)
GYOTOKU YUYA (JP)
AKIMOTO KIYOTAKA (JP)
KOBAYASHI ATSUSHI (JP)
MAEDA SUSUMU (JP)
KANAYAMA MASAO (JP)
IMATAKA HIDEKI (JP)
YUYA MASATO (JP)
GYOTOKU YUYA (JP)
AKIMOTO KIYOTAKA (JP)
Application Number:
PCT/JP2013/061396
Publication Date:
October 24, 2013
Filing Date:
April 17, 2013
Export Citation:
Assignee:
DOWA THERMOTECH CO LTD (JP)
HONDA MOTOR CO LTD (JP)
NIPPON STEEL & SUMITOMO METAL CORP (JP)
HONDA MOTOR CO LTD (JP)
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C21D1/06; C23C8/26; C21D1/76; C21D9/32; C22C38/00; C22C38/24; F16H55/06
Foreign References:
JP2006225741A | 2006-08-31 | |||
JP2002097563A | 2002-04-02 | |||
JP2006028588A | 2006-02-02 |
Other References:
HISAHIKO YAMANAKA, ION CHIKKAHO, vol. 1ST ED., 10 July 1976 (1976-07-10), pages 70 - 71, 79, 141
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
Yasushi Hagiwara (JP)
Yasushi Hagiwara (JP)
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