EP 3666919 A4 20200617 - PLATED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY, STRENGTH AND DUCTILITY
Title (en)
PLATED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY, STRENGTH AND DUCTILITY
Title (de)
PLATTIERTES STAHLBLECH MIT HERVORRAGENDER OBERFLÄCHENQUALITÄT, FESTIGKEIT UND DUKTILITÄT
Title (fr)
TÔLE D'ACIER PLAQUÉE AYANT UNE EXCELLENTE QUALITÉ DE SURFACE, UNE EXCELLENTE RÉSISTANCE ET UNE EXCELLENTE DUCTILITÉ
Publication
Application
Priority
- KR 20170101268 A 20170809
- KR 2018008848 W 20180803
Abstract (en)
[origin: EP3666919A1] Disclosed are: a plated steel sheet having a plated film on the surface of a hot rolled steel sheet; and a method for manufacturing the same, wherein the hot rolled steel sheet comprises, by wt%, 0.15-0.25% of C, 0.5% or less of Si, 0.5-2.0% of Mn, 0.03% or less of P, 0.015% or less of S, 0.05% or less of Al, 0.01% or less of N, 0.05% or less of Ti (excluding 0%), 0.01% or less of B (excluding 0%) and the balance of Fe and inevitable impurities, satisfies the following relation 1, and comprises, as a microstructure, 10-30 area% of ferrite, 20-40 area% of pearlite and 35-55 area% of bainite.0.235C+0.0158Mn+0.0625Si+0.0423Mo+0.317Ti+1.36Nb≤0.075wherein [C], [Mn], [Si], [Mo], [Ti] and [Nb] respectively mean the amounts (wt%) of the corresponding elements included in a steel sheet.
IPC 8 full level
C22C 38/14 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 30/00 (2006.01)
CPC (source: EP KR US)
C21D 6/005 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0247 (2013.01 - KR); C21D 9/46 (2013.01 - EP KR US); C22C 18/00 (2013.01 - US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - KR US); C22C 38/12 (2013.01 - US); C22C 38/14 (2013.01 - EP KR US); C23C 2/02 (2013.01 - EP KR US); C23C 2/0224 (2022.08 - EP KR US); C23C 2/06 (2013.01 - EP KR US); C23C 2/40 (2013.01 - US); C23C 30/00 (2013.01 - EP); C21D 2211/002 (2013.01 - EP KR); C21D 2211/005 (2013.01 - EP KR); C21D 2211/009 (2013.01 - EP KR)
Citation (search report)
- [XAI] US 2013319582 A1 20131205 - YOKOI TATSUO [JP], et al
- [A] JP 2014095146 A 20140522 - JFE STEEL CORP
- [A] US 2015284819 A1 20151008 - TAMAKI AKARI [JP], et al
- [A] US 2008202639 A1 20080828 - TOMIDA TOSHIROU [JP], et al
- See references of WO 2019031773A1
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 3666919 A1 20200617; EP 3666919 A4 20200617; EP 3666919 B1 20231108; CN 110997963 A 20200410; ES 2970206 T3 20240527; JP 2020530068 A 20201015; JP 6952869 B2 20211027; KR 101977474 B1 20190510; KR 20190016826 A 20190219; PT 3666919 T 20240208; US 2020377963 A1 20201203; WO 2019031773 A1 20190214
DOCDB simple family (application)
EP 18845253 A 20180803; CN 201880051691 A 20180803; ES 18845253 T 20180803; JP 2020506319 A 20180803; KR 20170101268 A 20170809; KR 2018008848 W 20180803; PT 18845253 T 20180803; US 201816636794 A 20180803