EP 3199255 A4 20171101 - RAIL MANUFACTURING METHOD AND RAIL MANUFACTURING APPARATUS
Title (en)
RAIL MANUFACTURING METHOD AND RAIL MANUFACTURING APPARATUS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON SCHIENEN UND VORRICHTUNG ZUR SCHIENENHERSTELLUNG
Title (fr)
PROCÉDÉ DE FABRICATION DE RAIL ET APPAREIL DE FABRICATION DE RAIL
Publication
Application
Priority
- JP 2014192919 A 20140922
- JP 2015004617 W 20150910
Abstract (en)
[origin: EP3199255A1] To provide a method and an apparatus for manufacturing a rail having high ductility in both a head portion and a foot portion. A heated steel rail material is hot-rolled, the temperature is adjusted by cooling the hot-rolled steel rail material, the steel rail material subjected to the temperature adjustment is processed into a rail shape by means of temperature-adjusted rolling at an area reduction ratio of 20% or more, and, in adjusting the temperature of the steel rail material, the surface portions of the steel rail material corresponding to a head portion and a foot portion of the rail shape so that the temperatures of the surface portions reach 500°C or more and 1,000C or less.
IPC 8 full level
B21B 1/085 (2006.01); C21D 8/00 (2006.01); C21D 9/04 (2006.01); C22C 38/00 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP US)
B21B 1/085 (2013.01 - EP US); C21D 8/00 (2013.01 - EP US); C21D 8/005 (2013.01 - EP US); C21D 9/04 (2013.01 - EP US); C22C 38/002 (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 38/26 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US)
Citation (search report)
- [XA] JP 2001234238 A 20010828 - NIPPON STEEL CORP
- [XA] WO 2005085481 A1 20050915 - NIPPON STEEL CORP [JP], et al
- [X] JP 2002226915 A 20020814 - NIPPON STEEL CORP
- [YA] JP 5472418 B2 20140416
- [YA] US 4575397 A 19860311 - HELLER WILHELM [DE]
- See references of WO 2016047076A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3199255 A1 20170802; EP 3199255 A4 20171101; EP 3199255 B1 20200722; AU 2015323176 A1 20170413; AU 2018271236 A1 20181213; AU 2018271236 B2 20200723; BR 112017005296 A2 20171212; CA 2962031 A1 20160331; CA 2962031 C 20190514; CN 106714990 A 20170524; JP 6233525 B2 20171122; JP WO2016047076 A1 20170427; US 2017283895 A1 20171005; WO 2016047076 A1 20160331
DOCDB simple family (application)
EP 15845139 A 20150910; AU 2015323176 A 20150910; AU 2018271236 A 20181126; BR 112017005296 A 20150910; CA 2962031 A 20150910; CN 201580050683 A 20150910; JP 2015004617 W 20150910; JP 2016549924 A 20150910; US 201515511431 A 20150910