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Title:
SOFT-NITRIDED INDUCTION-QUENCHED STEEL COMPONENT
Document Type and Number:
WIPO Patent Application WO/2014/192117
Kind Code:
A1
Abstract:
 A soft-nitrided induction-quenched steel component having excellent surface fatigue strength, characterized in having a predetermined chemical composition, a solid solution N concentration of 0.05 to 1.5% to a depth of 0.2 mm from the surface, a Vickers hardness of Hv 600 or higher to a depth of 0.2 mm from the surface following tempering at 300°C, an effective hardening layer depth (t) of 0.5 mm or more, and a ratio t/r ≦ 0.35, where r (mm) is the radius or half the thickness of a location liable to be damaged.

Inventors:
KOYAMA TATSUYA (JP)
YOSHIDA SUGURU (JP)
Application Number:
PCT/JP2013/065063
Publication Date:
December 04, 2014
Filing Date:
May 30, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C21D1/06; C22C38/00; C21D1/10; C21D9/32; C22C38/38; C22C38/60; C23C8/32; C23C8/80
Domestic Patent References:
WO2012056785A12012-05-03
WO2010082685A12010-07-22
WO2010070958A12010-06-24
WO2010082685A12010-07-22
WO2010070958A12010-06-24
Foreign References:
JP2011208250A2011-10-20
JP2007077411A2007-03-29
JPH06172961A1994-06-21
JP2011208250A2011-10-20
JPH06172961A1994-06-21
JP2007077411A2007-03-29
JPH0790364A1995-04-04
Other References:
See also references of EP 3006584A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
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