EP 2145973 A1 20100120 - Alloyed hot-dip galvanized steel sheet and production method thereof
Title (en)
Alloyed hot-dip galvanized steel sheet and production method thereof
Title (de)
Legiertes feuerverzinktes Stahlblech und Herstellungsverfahren dafür
Title (fr)
Tôle d'acier galvanisé à chaud à alliages et son procédé de production
Publication
Application
Priority
JP 2008182910 A 20080714
Abstract (en)
Disclosed is an alloyed hot-dip galvanized steel sheet containing 2.0 to 3.5 percent by mass of Mn. The steel sheet includes a base steel sheet and a galvanized zinc-coat layer thereon, in which MnO particles are present in an average number of 10 or less per micrometer on a straight line lying in an interface between the galvanized zinc-coat layer and the steel sheet, an Fe-Al-O alloy layer is present at the interface between the MnO particles and the steel sheet, and the length of the Fe-Al-O alloy layer is less than 10% of the overall length of the interface. The alloyed hot-dip galvanized steel sheet, even though having a high Mn content, is resistant to uneven alloying and excels in surface appearance, because the amounts of the MnO particles and the Fe-Al-O alloy layer that cause uneven alloying are controlled.
IPC 8 full level
C23C 2/02 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C23C 2/06 (2006.01)
CPC (source: EP KR US)
C21D 1/74 (2013.01 - EP KR US); C21D 6/005 (2013.01 - EP KR US); C21D 8/0278 (2013.01 - EP KR US); C21D 8/0478 (2013.01 - EP KR US); C21D 9/46 (2013.01 - KR); C21D 9/48 (2013.01 - KR); C22C 38/04 (2013.01 - KR); C22C 38/06 (2013.01 - EP KR US); C22C 38/18 (2013.01 - KR); C22C 38/38 (2013.01 - EP KR US); C23C 2/02 (2013.01 - EP US); C23C 2/022 (2022.08 - EP KR US); C23C 2/024 (2022.08 - EP KR US); C23C 2/06 (2013.01 - EP KR US); C23C 2/28 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C21D 9/48 (2013.01 - EP US)
Citation (applicant)
- JP 2005200711 A 20050728 - JFE STEEL KK
- JP 2001279410 A 20011010 - KAWASAKI STEEL CO
- JP H0688193 A 19940329 - NIPPON KOKAN KK
- JP 2003328036 A 20031119 - NIPPON STEEL CORP
- JP 2004263271 A 20040924 - JFE STEEL KK
Citation (search report)
- [X] EP 1041167 A1 20001004 - KAWASAKI STEEL CO [JP]
- [X] US 2003091857 A1 20030515 - PRADHAN RAJENDRA [US], et al
- [X] WO 2004063410 A1 20040729 - NIPPON STEEL CORP [JP], et al
- [X] WO 2007109865 A1 20071004 - CT RECH METALLURGIQUES ASBL [BE], et al
- [A] R. KHONDKER ET AL: "Effect of annealing atmosphere on the galvanizing behaviour of a dua-phase steel", MATERIALS SCIENCE AND ENGINEERING A, vol. 463, 2007, pages 157 - 165, XP002546226
Designated contracting state (EPC)
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 SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2145973 A1 20100120; CN 101629266 A 20100120; JP 2010018874 A 20100128; KR 20100007805 A 20100122; US 2010006184 A1 20100114
DOCDB simple family (application)
EP 09008686 A 20090702; CN 200910152113 A 20090714; JP 2008182910 A 20080714; KR 20090063286 A 20090713; US 48455309 A 20090615