Title:
RAIL
Document Type and Number:
WIPO Patent Application WO/2016/117692
Kind Code:
A1
Abstract:
This rail has a predetermined chemical composition. At least 90% of the metallographic structure from the outer surface of the rail bottom to a depth of 5 mm is pearlite structure. The surface hardness HC of the foot-bottom central section is Hv 360-500, and the surface hardness HE of the foot-front section is Hv 260-315. HC, HE, and the surface hardness HM of a middle section located between the foot-bottom central section and the foot-front section satisfy HC≥HM≥HE.
Inventors:
UEDA MASAHARU (JP)
YAMAMOTO TAKESHI (JP)
MIYAZAKI TERUHISA (JP)
YAMAMOTO TAKESHI (JP)
MIYAZAKI TERUHISA (JP)
Application Number:
PCT/JP2016/051890
Publication Date:
July 28, 2016
Filing Date:
January 22, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/04; C22C38/58; E01B5/02; C21D8/00
Domestic Patent References:
| WO2011021582A1 | 2011-02-24 | |||
| WO2014157198A1 | 2014-10-02 |
Foreign References:
| JPS477606A | ||||
| JP2005290486A | 2005-10-20 | |||
| JP2006057128A | 2006-03-02 | |||
| US4895605A | 1990-01-23 | |||
| US20110253268A1 | 2011-10-20 |
Other References:
See also references of EP 3249070A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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