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)
YOSHIDA SUGURU (JP)
Application Number:
PCT/JP2013/065063
Publication Date:
December 04, 2014
Filing Date:
May 30, 2013
Export Citation:
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:
WO2012056785A1 | 2012-05-03 | |||
WO2010082685A1 | 2010-07-22 | |||
WO2010070958A1 | 2010-06-24 | |||
WO2010082685A1 | 2010-07-22 | |||
WO2010070958A1 | 2010-06-24 |
Foreign References:
JP2011208250A | 2011-10-20 | |||
JP2007077411A | 2007-03-29 | |||
JPH06172961A | 1994-06-21 | |||
JP2011208250A | 2011-10-20 | |||
JPH06172961A | 1994-06-21 | |||
JP2007077411A | 2007-03-29 | |||
JPH0790364A | 1995-04-04 |
Other References:
See also references of EP 3006584A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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