EP 2855080 A1 20150408 - METHOD FOR WELDING TWO EDGES OF ONE OR MORE STEEL PARTS TO EACH OTHER INCLUDING A HEAT TREATMENT STEP AFTER THE WELDING STEP: PENSTOCK OBTAINED WITH SUCH A METHOD
Title (en)
METHOD FOR WELDING TWO EDGES OF ONE OR MORE STEEL PARTS TO EACH OTHER INCLUDING A HEAT TREATMENT STEP AFTER THE WELDING STEP: PENSTOCK OBTAINED WITH SUCH A METHOD
Title (de)
VERFAHREN ZUM VERSCHWEISSEN ZWEIER KANTEN VON EINEM ODER MEHREREN STAHLTEILEN EINSCHLIESSLICH EINES WÄRMEBEHANDLUNGSSCHRITTS NACH DEM SCHWEISSSCHRITT: MIT SOLCH EINEM VERFAHREN HERGESTELLTE DRUCKROHRLEITUNG
Title (fr)
PROCEDE DE SOUDAGE DE DEUX BORDS D'UNE OU PLUSIEURS PIECES EN ACIER L' UN A L'AUTRE INCLUANT UNE ETAPE DE TRAITEMENT THERMIQUE POSTERIEURE A L'ETAPE DE SOUDURE : CONDUITE FORCEE OBTENUE PAR UN TEL PROCEDE
Publication
Application
Priority
- FR 1255239 A 20120605
- EP 2013061535 W 20130605
Abstract (en)
[origin: WO2013182582A1] The present application describes a method (22) for welding two parts to each other, said two parts being made from steel having a high thermomechanical yield strength, said welding method (22) comprising a welding step (24) in which a weld bead is created inducing a heat-affected zone (HAZ) to appear. The method (22) also comprises a heat treatment step (28) comprising a heating step (281), during which at least one portion of the weld bead and the HAZ is gradually heated to a treatment temperature (T), then a holding step (282) in which the portion of the weld bead and the HAZ is kept at the treatment temperature (T), then a cooling step (283) in which the HAZ and the weld bead are gradually cooled and pass from the austenitic transformation end temperature to the martensitic transformation end temperature of the steel of the parts in a time (T8/5) comprised between 7.5 s and 8.5 s, and pass from the austenitic transformation end temperature to the martensitic transformation end temperature in a time (T8/4) shorter than 15.5 s. The present application also describes a penstock obtained with such a method.
IPC 8 full level
B23K 31/02 (2006.01); B23K 9/02 (2006.01); B23K 9/16 (2006.01); B23K 9/173 (2006.01); C21D 9/50 (2006.01)
CPC (source: CN EP KR US)
B23K 9/02 (2013.01 - CN EP KR US); B23K 9/173 (2013.01 - CN EP KR US); B23K 31/02 (2013.01 - CN EP KR US); B23K 35/004 (2013.01 - CN EP KR US); B23K 35/3073 (2013.01 - CN EP KR US); C21D 9/505 (2013.01 - CN EP KR US); F16L 13/02 (2013.01 - KR US); B23K 2103/04 (2018.07 - CN EP KR US); C21D 2211/001 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - CN EP KR US); C21D 2211/008 (2013.01 - CN EP KR US)
Citation (search report)
See references of WO 2013182582A1
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)
FR 2991213 A1 20131206; FR 2991213 B1 20150703; BR 112014030004 A2 20170627; CA 2874945 A1 20131212; CN 104520060 A 20150415; EP 2855080 A1 20150408; KR 20150024383 A 20150306; RU 2014152991 A 20160727; US 2015084333 A1 20150326; WO 2013182582 A1 20131212
DOCDB simple family (application)
FR 1255239 A 20120605; BR 112014030004 A 20130605; CA 2874945 A 20130605; CN 201380041662 A 20130605; EP 13728702 A 20130605; EP 2013061535 W 20130605; KR 20157000037 A 20130605; RU 2014152991 A 20130605; US 201414560271 A 20141204