EP 0610460 A1 19940817 - RAIL THERMAL TREATMENT PROCESS.
Title (en)
RAIL THERMAL TREATMENT PROCESS.
Title (de)
VERFAHREN ZUM WÄRMEBEHANDELN VON SCHIENEN.
Title (fr)
PROCEDE DE TRAITEMENT THERMIQUE DE RAILS.
Publication
Application
Priority
- AT 145592 A 19920715
- AT 9300116 W 19930709
Abstract (en)
[origin: WO9402652A1] A process is disclosed for thermally treating rails, in particular rails heads, according to which the rails are cooled in a synthetic additive-containing cooling medium from temperatures above 720 C. In order to prevent the stem of the rail from hardening while maintaining optimum cooling speeds for the rail head, immersion in the cooling medium is continued until a surface temperature between 450 C and 550 C is obtained after drawing the submerged areas of the rails without temperature equalization over the whole cross section.
Abstract (fr)
Selon un procédé de traitement thermique de rails, notamment de champignons de rails, ceux-ci sont refroidis dans un agent de refroidissement contenant un additif synthétique à partir de températures supérieures à 720 °C. Afin d'éviter un durcissement par trempe de l'âme du rail tout en assurant des vitesses optimales de refroidissement du champignon du rail, le traitement par immersion dans l'agent de refroidissement se poursuit jusqu'à obtenir après étirement des zones immergées une température superficielle comprise entre 450 °C et 550 °C sans équilibrage de la température sur toute la section transversale.
IPC 1-7
IPC 8 full level
C21D 9/04 (2006.01); C21D 1/60 (2006.01); C21D 1/63 (2006.01)
CPC (source: EP US)
C21D 9/04 (2013.01 - EP US); C21D 1/60 (2013.01 - EP US); C21D 1/63 (2013.01 - EP US); C21D 2221/02 (2013.01 - EP US)
Citation (search report)
See references of WO 9402652A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9402652 A1 19940203; AT 399346 B 19950425; AT A145592 A 19940915; AT E185845 T1 19991115; BR 9305583 A 19960102; CA 2116216 A1 19940203; CA 2116216 C 20010918; CN 1040232 C 19981014; CN 1085258 A 19940413; CZ 283571 B6 19980513; CZ 56394 A3 19940615; DE 59309839 D1 19991125; EP 0610460 A1 19940817; EP 0610460 B1 19991020; ES 2139661 T3 20000216; HR P931054 A2 19950630; HR P931054 B1 20000229; KR 0134900 B1 19980615; LT 3008 B 19940825; LT IP797 A 19940325; LV 11192 A 19960420; LV 11192 B 19960620; MD 940198 A 19960131; PL 175451 B1 19981231; PL 302766 A1 19940822; RU 94019951 A 19960410; SK 281598 B6 20010510; SK 29494 A3 19941109; TW 259818 B 19951011; UA 26282 C2 19990719; US 2001023724 A1 20010927; US 6406569 B1 20020618; US 6547897 B2 20030415
DOCDB simple family (application)
AT 9300116 W 19930709; AT 145592 A 19920715; AT 93914544 T 19930709; BR 9305583 A 19930709; CA 2116216 A 19930709; CN 93109864 A 19930714; CZ 56394 A 19930709; DE 59309839 T 19930709; EP 93914544 A 19930709; ES 93914544 T 19930709; HR P931054 A 19930715; KR 19940070834 A 19940314; LT IP797 A 19930715; LV 930992 A 19930715; MD 940198 A 19940714; PL 30276693 A 19930709; RU 94019951 A 19940314; SK 29494 A 19930709; TW 82105625 A 19930715; UA 94005532 A 19930709; US 53394495 A 19950926; US 86428801 A 20010525