EP 3369836 A1 20180905 - METHOD FOR MANUFACTURING HOT-DIP GALVANIZED STEEL SHEET
Title (en)
METHOD FOR MANUFACTURING HOT-DIP GALVANIZED STEEL SHEET
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES FEUERVERZINKTEN STAHLBLECHS
Title (fr)
PROCÉDÉ DE FABRICATION DE TÔLE D'ACIER GALVANISÉE PAR TREMPAGE À CHAUD
Publication
Application
Priority
- JP 2015211121 A 20151027
- JP 2016003631 W 20160805
Abstract (en)
A method of producing a hot-dip galvanized steel sheet whereby favorable coating appearance can be obtained with high coating adhesion even in the case of hot-dip galvanizing a steel strip whose Si content is 0.2 mass% or more is provided. The method includes: annealing a steel strip by conveying the steel strip through a heating zone, a soaking zone, and a cooling zone in this order inside an annealing furnace; and applying a hot-dip galvanized coating onto the steel strip discharged from the cooling zone. Reducing gas or non-oxidizing gas supplied into the soaking zone includes humidified gas and dry gas. While a width and a sheet passing speed of the steel strip passing through the soaking zone are constant, a variation of pressure in the annealing furnace is suppressed by adjusting a flow rate of the dry gas, and a variation range of an amount of moisture supplied into the soaking zone by the humidified gas is limited to 20 % or less.
IPC 8 full level
C23C 2/02 (2006.01); C21D 1/76 (2006.01); C21D 9/56 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01)
CPC (source: EP KR US)
C21D 1/76 (2013.01 - EP KR US); C21D 9/56 (2013.01 - KR); C21D 9/561 (2013.01 - EP US); C21D 9/573 (2013.01 - EP US); C23C 2/003 (2013.01 - EP US); C23C 2/0038 (2022.08 - EP KR US); C23C 2/004 (2022.08 - EP US); C23C 2/022 (2022.08 - KR); C23C 2/0222 (2022.08 - EP KR US); C23C 2/0224 (2022.08 - EP US); C23C 2/06 (2013.01 - EP KR US); C23C 2/261 (2022.08 - KR); C23C 2/28 (2013.01 - EP KR US); C23C 2/29 (2022.08 - KR); C23C 2/40 (2013.01 - EP KR US); C23C 2/50 (2022.08 - KR); C22C 38/00 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US)
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 3369836 A1 20180905; EP 3369836 A4 20181107; EP 3369836 B1 20191009; CN 108138297 A 20180608; CN 108138297 B 20200623; JP 2017082278 A 20170518; JP 6439654 B2 20181219; KR 102072560 B1 20200203; KR 20180064497 A 20180614; MX 2018005073 A 20180528; US 2018237896 A1 20180823; WO 2017072989 A1 20170504
DOCDB simple family (application)
EP 16859230 A 20160805; CN 201680060387 A 20160805; JP 2015211121 A 20151027; JP 2016003631 W 20160805; KR 20187013015 A 20160805; MX 2018005073 A 20160805; US 201615753260 A 20160805