EP 2432910 B2 20220803 - METHOD FOR HOT-DIP COATING A FLAT STEEL PRODUCT CONTAINING 2-35 WT% MN AND FLAT STEEL PRODUCT
Title (en)
METHOD FOR HOT-DIP COATING A FLAT STEEL PRODUCT CONTAINING 2-35 WT% MN AND FLAT STEEL PRODUCT
Title (de)
VERFAHREN ZUM SCHMELZTAUCHBESCHICHTEN EINES 2-35 GEW.-% MN ENTHALTENDEN STAHLFLACHPRODUKTS UND STAHLFLACHPRODUKT
Title (fr)
PROCÉDÉ DE REVÊTEMENT PAR IMMERSION À CHAUD D'UN PRODUIT PLAT EN ACIER CONTENANT DE 2 À 35 % EN MASSE DE MN, AINSI QUE PRODUIT PLAT EN ACIER
Publication
Application
Priority
- EP 2010055334 W 20100422
- DE 102009018577 A 20090423
Abstract (en)
[origin: CA2759369A1] The present invention relates to a method by means of which flat steel products containing 2 - 35 wt% Mn can be provided with a well adhering Zn coating. For this purpose, the method according to the invention provides that the particular flat steel product is annealed at an annealing temperature Tg of 600 - 1100°C over an annealing duration of 10 - 240 s under an annealing atmosphere that is reductive in relation to FeO present on the flat steel product and oxidative in relation to the Mn contained in the steel substrate, which annealing atmosphere contains 0.01 - 85 vol% H2, H2O, and as the rest N2 and technically unavoidable impurities and has a dew point between -70°C and +60°C, wherein the following applies to the H2O/H2 ratio of the atmosphere: 8x10-15*Tg3.529 < H2O/H2 = 0.957. In this way, an Mn mixed oxide layer providing coverage at least in some sections is produced on the flat steel product. The annealed flat steel product is subsequently cooled to a bath entrance temperature, at which the flat steel product is then guided within a dip time of 0.1 - 10 s through an iron-saturated, 420 - 520°C Zn melt bath, which in addition to the main component zinc and unavoidable impurities contains 0.05 - 8 wt% Al and/or up to 8 wt% Mg and optionally Si < 2%, Pb < 0.1%, Ti < 0.2%, Ni < 1%, Cu < 1%, Co < 0.3%, Mn < 0.5%, Cr < 0.2%, Sr < 0.5%, Fe < 3%, B < 0.1%, Bi < 0.1%, Cd < 0.1%.
IPC 8 full level
CPC (source: EP KR US)
C23C 2/0222 (2022.08 - EP KR US); C23C 2/0224 (2022.08 - EP KR US); C23C 2/026 (2022.08 - EP KR US); C23C 2/06 (2013.01 - EP KR US); C23C 2/40 (2013.01 - KR)
Citation (opposition)
Opponent :
- WO 2008022980 A2 20080228 - THYSSENKRUPP STEEL AG [DE], et al
- BE 1011131 A6 19990504 - CENTRE RECH METALLURGIQUE [BE]
- WO 2007109865 A1 20071004 - CT RECH METALLURGIQUES ASBL [BE], et al
- CN 100368580 C 20080213 - NIPPON STEEL CORP [JP]
- JP 2007211279 A 20070823 - NIPPON STEEL CORP
- JP 2008156734 A 20080710 - JFE STEEL KK
- DE 2522485 A1 19751204 - ARMCO STEEL CORP
- DE 102004059566 B3 20060803 - THYSSENKRUPP STEEL AG [DE]
- WO 2006002843 A1 20060112 - CORUS STAAL BV [NL], et al
- WO 2008102009 A1 20080828 - CORUS STAAL BV [NL], et al
- KIM ET AL.: "Galvanizability of Advanced High-Strength Steels 1180TRIP and 1180CP", GALVANIZERS ASSOCIATION 100TH ANNUAL MEETING, 27 October 2008 (2008-10-27), Baltimore, Maryland, USA, pages 1 - 14
- FOURMENTIN ET AL.: "MICROSTRUCTURE AND PROPERTIES OF RAPIDLY HEAT TREATED AND GALVANIZED DUAL PHASE STEEL", 7TH INTERNATIONAL CONFERENCE ON ZINC AND ZINC ALLOY COATED STEEL SHEET GALVATECH`07, 2007, pages 380 - 385
- GAO ET AL.: "GALVANIZING TRIP STEEL USING THE DIRECT REDUCTION PROCESS", 7TH INTERNATIONAL CONFERENCE ON ZINC AND ZINC ALLOY COATED STEEL SHEET GALVATECH`07, 2007, pages 472 - 477
- HUIN D; FLAUDER P; J-B LEBLOND: "Numerical Simulation of Internal Oxidation of Steels during Annealing Treatments", OXIDATION OF METALS,, vol. 64, no. 1-2, August 2005 (2005-08-01), pages 131 - 167
- XUE BIN YU, XIN YAN JIN, QUAN CHENG ZHANG: "Top dross and bath behavior from galvannealing to galvanizing transition", 7TH INTERNATIONAL CONFERENCE ON ZINC AND ZINC ALLOY COATED STEEL SHEET GALVATECH`07, 18 November 2007 (2007-11-18) - 22 November 2007 (2007-11-22), Osaka, Japan, pages 129 - 134
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
DOCDB simple family (publication)
DE 102009018577 B3 20100729; AU 2010240903 A1 20111110; AU 2016200172 A1 20160128; AU 2016200172 B2 20170803; BR PI1016179 A2 20160419; BR PI1016179 B1 20200407; CA 2759369 A1 20101028; CA 2759369 C 20170207; CN 102421928 A 20120418; CN 102421928 B 20151021; EP 2432910 A1 20120328; EP 2432910 B1 20190213; EP 2432910 B2 20220803; ES 2717878 T3 20190626; JP 2012524839 A 20121018; JP 5834002 B2 20151216; KR 101679006 B1 20161124; KR 20120025476 A 20120315; PL 2432910 T3 20190731; TR 201906585 T4 20190521; US 2012125491 A1 20120524; US 9611527 B2 20170404; WO 2010122097 A1 20101028
DOCDB simple family (application)
DE 102009018577 A 20090423; AU 2010240903 A 20100422; AU 2016200172 A 20160101; BR PI1016179 A 20100422; CA 2759369 A 20100422; CN 201080018273 A 20100422; EP 10717595 A 20100422; EP 2010055334 W 20100422; ES 10717595 T 20100422; JP 2012506496 A 20100422; KR 20117027436 A 20100422; PL 10717595 T 20100422; TR 201906585 T 20100422; US 201013265573 A 20100422