EP 2612943 A1 20130710 - STEEL RAIL FOR HIGH SPEED AND QUASI-HIGH SPEED RAILWAYS AND MANUFACTURING METHOD THEREOF
Title (en)
STEEL RAIL FOR HIGH SPEED AND QUASI-HIGH SPEED RAILWAYS AND MANUFACTURING METHOD THEREOF
Title (de)
STAHLSCHIENE FÜR HOCHGESCHWINDIGKEITS- UND QUASI-HOCHGESCHWINDIGKEITSZÜGE UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
RAIL D'ACIER POUR VOIES FERRÉES À GRANDE VITESSE ET À QUASI GRANDE VITESSE ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- CN 201010270439 A 20100902
- CN 2011079278 W 20110902
Abstract (en)
The present discloses a steel rail for high speed and quasi-high speed railways and a manufacturing method thereof. The steel rail having a superior rolling contact fatigue property can be obtained by reducing content of carbon in conjunction with controlled cooling after rolling. The steel rail includes 0.40-0.64% by weight of C, 0.10-1.00% by weight of Si, 0.30-1.50% by weight of Mn, less than or equal to 0.025% by weight of P, less than or equal to 0.025% by weight of S, less than or equal to 0.005% by weight of Al, more than 0 and less than or equal to 0.05% by weight of a rare earth element, more than 0 and less than or equal to 0.20% by weight of at least one of V, Cr, and Ti, and a remainder of Fe and inevitable impurities. The steel rail manufactured according to the method of the present invention maintains the strength and hardness of the existing steel rail for the high speed railways, while enhancing the toughness, plasticity and yield strength, and an energy value required for initiating and expanding microcracks formed at the surface of the steel rail due to fatigue is increased, and thus under the same conditions, the rolling contact fatigue property of the steel rail can be improved, thereby finally improving the service lifetime and the transportation safety of the steel rail.
IPC 8 full level
C22C 38/14 (2006.01); C21D 8/00 (2006.01); C22C 38/18 (2006.01)
CPC (source: EP US)
C21D 9/04 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); E01B 5/02 (2013.01 - US); C21D 2211/005 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP US); Y10T 29/49991 (2015.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2612943 A1 20130710; EP 2612943 A4 20170705; BR 112013005163 A2 20160426; BR 112013005163 B1 20181023; CN 101921950 A 20101222; CN 101921950 B 20111214; US 2013193223 A1 20130801; WO 2012028111 A1 20120308; WO 2012028111 A8 20120712
DOCDB simple family (application)
EP 11821137 A 20110902; BR 112013005163 A 20110902; CN 201010270439 A 20100902; CN 2011079278 W 20110902; US 201113820493 A 20110902