EP 3421625 A4 20190731 - PROCESS FOR PRODUCING STEEL SHEET AND DEVICE FOR CONTINUOUSLY ANNEALING STEEL SHEET
Title (en)
PROCESS FOR PRODUCING STEEL SHEET AND DEVICE FOR CONTINUOUSLY ANNEALING STEEL SHEET
Title (de)
VERFAHREN ZUR HERSTELLUNG VON STAHLBLECH UND VORRICHTUNG ZUM DURCHLAUFGLÜHEN VON STAHLBLECH
Title (fr)
PROCÉDÉ DE PRODUCTION DE TÔLE D'ACIER ET DISPOSITIF DE RECUIT CONTINU DE TÔLE D'ACIER
Publication
Application
Priority
JP 2016055601 W 20160225
Abstract (en)
[origin: EP3421625A1] The present method for manufacturing a high strength steel sheet having a tensile strength of 780 MPa or higher includes continuous annealing by heating a steel sheet having a predetermined chemical composition to 750°C to 900°C and holding the steel sheet in the temperature range for 0 seconds to 300 seconds, in which, during heating and holding, a hydrogen concentration in a furnace atmosphere is less than 10 volume%, when a temperature of the steel sheet is 700°C or lower, a furnace body average value is higher than -3.01 and lower than -0.07, when the temperature is higher than 700°C and 800°C or lower, the value is higher than -1.36 and lower than -0.07, when the temperature is higher than 800°C, the value is higher than -3.01 and -0.53 or lower, and a dew point is lower than -10°C.
IPC 8 full level
C21D 9/56 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C21D 11/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 22/12 (2006.01); C23C 22/78 (2006.01)
CPC (source: EP KR US)
C21D 6/002 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C21D 9/56 (2013.01 - EP US); C21D 9/561 (2013.01 - KR); C21D 11/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/42 (2013.01 - KR); C22C 38/48 (2013.01 - KR); C22C 38/50 (2013.01 - KR); C23C 2/0038 (2022.08 - EP US); C23C 2/02 (2013.01 - EP US); C23C 2/0222 (2022.08 - EP US); C23C 2/0224 (2022.08 - KR); C23C 2/06 (2013.01 - EP KR US); C23C 2/40 (2013.01 - EP KR US); C23C 22/12 (2013.01 - KR); C23C 22/78 (2013.01 - KR); C23C 22/12 (2013.01 - EP US); C23C 22/78 (2013.01 - EP US)
Citation (search report)
- [X] JP 2011111673 A 20110609 - NIPPON STEEL CORP
- [X] JP 2011111675 A 20110609 - NIPPON STEEL CORP
- [A] US 2012186707 A1 20120726 - HIRASAWA JUNICHIRO [JP], et al
- [A] US 4268326 A 19810519 - IWAYAMA KENZO, et al
- See also references of WO 2017145322A1
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 3421625 A1 20190102; EP 3421625 A4 20190731; BR 112018013937 A2 20181211; CN 108474059 A 20180831; CN 108474059 B 20200317; JP 6673461 B2 20200325; JP WO2017145322 A1 20181018; KR 102135839 B1 20200721; KR 20180096781 A 20180829; MX 2018009259 A 20181109; US 2019024208 A1 20190124; WO 2017145322 A1 20170831
DOCDB simple family (application)
EP 16891479 A 20160225; BR 112018013937 A 20160225; CN 201680079282 A 20160225; JP 2016055601 W 20160225; JP 2018501497 A 20160225; KR 20187021615 A 20160225; MX 2018009259 A 20160225; US 201616068009 A 20160225