EP 4200450 A1 20230628 - PROCESS FOR MANUFACTURING A FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING, AND FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING
Title (en)
PROCESS FOR MANUFACTURING A FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING, AND FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING
Title (de)
VERFAHREN ZUM HERSTELLEN EINES STAHLFLACHPRODUKTES MIT EINEM ALUMINIUM-BASIERTEN KORROSIONSSCHUTZÜBERZUG UND STAHLFLACHPRODUKT MIT EINEM ALUMINIUM-BASIERTEN KORROSIONSSCHUTZÜBERZUG
Title (fr)
PROCÉDÉ DE FABRICATION D'UN PRODUIT PLAT EN ACIER AYANT UN REVÊTEMENT RÉSISTANT À LA CORROSION À BASE D'ALUMINIUM, ET PRODUIT PLAT EN ACIER AYANT UN REVÊTEMENT RÉSISTANT À LA CORROSION À BASE D'ALUMINIUM
Publication
Application
Priority
- EP 2020073159 W 20200819
- EP 2021072833 W 20210817
Abstract (en)
[origin: WO2022038135A1] The invention relates to a process for manufacturing a flat steel product (9) having a prealloyed corrosion-resistant coating (13), comprising at least the following steps: - providing a coated flat steel product (9) comprising a steel substrate (11) having an aluminum-based corrosion-resistant coating (13) on at least one side of the steel substrate (11); - subjecting the coated flat steel product (9) to a heat treatment involving the following partial steps: i. heating the coated flat steel product (9) in a furnace at a furnace temperature T of 950°C to 1150°C and at a furnace dwell time t v of 40 s to 150 s, the furnace temperature being selected such that the heating rate of the coated flat steel product (9) in the temperature range of 500°C to 700°C is higher than 10 K/s; ii. maintaining the coated flat steel product (9) at a temperature above Ac3 for a hold time of 20 s to 60 s.
IPC 8 full level
C21D 1/34 (2006.01); B21D 22/02 (2006.01); C21D 1/42 (2006.01); C21D 6/00 (2006.01); C21D 7/13 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C23C 2/12 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C23C 30/00 (2006.01)
CPC (source: EP US)
C21D 1/34 (2013.01 - EP); C21D 1/42 (2013.01 - EP US); C21D 6/00 (2013.01 - US); C21D 6/002 (2013.01 - US); C21D 6/005 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 7/13 (2013.01 - EP); C21D 8/0205 (2013.01 - US); C21D 8/0221 (2013.01 - US); C21D 8/0247 (2013.01 - US); C21D 8/0278 (2013.01 - US); C21D 8/0447 (2013.01 - EP); C21D 8/0457 (2013.01 - EP); C21D 8/0473 (2013.01 - EP); C21D 8/0478 (2013.01 - EP); C21D 9/0081 (2013.01 - US); C21D 9/48 (2013.01 - EP); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - US); C22C 38/04 (2013.01 - US); C22C 38/06 (2013.01 - US); C22C 38/12 (2013.01 - US); C22C 38/14 (2013.01 - US); C22C 38/22 (2013.01 - US); C22C 38/26 (2013.01 - US); C22C 38/28 (2013.01 - US); C22C 38/32 (2013.01 - US); C22C 38/38 (2013.01 - US); C23C 2/12 (2013.01 - EP); C23C 2/28 (2013.01 - EP US); C23C 30/00 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 6/007 (2013.01 - EP); C21D 6/008 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/26 (2013.01 - EP); C22C 38/28 (2013.01 - EP); C22C 38/32 (2013.01 - EP); Y02P 10/25 (2015.11 - EP)
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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022038135 A1 20220224; CN 115885052 A 20230331; EP 4200450 A1 20230628; US 2023304117 A1 20230928
DOCDB simple family (application)
EP 2021072833 W 20210817; CN 202180051127 A 20210817; EP 21765866 A 20210817; US 202118020338 A 20210817