(19)

(11)

EP 4 182 488 A1

(12)

(43) Date of publication: 24.05.2023 Bulletin 2023/21 (21) Application number: 20746281.3 (22) Date of filing: 20.07.2020

(51) International Patent Classification (IPC):  C22C 38/58(2006.01) C22C 38/06(2006.01) C22C 38/50(2006.01) C22C 38/46(2006.01) C22C 38/00(2006.01) C22C 38/38(2006.01) C21D 8/02(2006.01) C21D 6/00(2006.01) C22C 38/02(2006.01) C22C 38/44(2006.01) C22C 38/48(2006.01) C22C 38/54(2006.01) C22C 38/22(2006.01) C21D 9/46(2006.01) C21D 6/02(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/58; C22C 38/02; C22C 38/06; C22C 38/001; C22C 38/44; C22C 38/50; C22C 38/48; C22C 38/46; C22C 38/54; C22C 38/22; C22C 38/38; C22C 38/00; C21D 9/46; C21D 8/02; C21D 8/0205; C21D 8/0226; C21D 8/0236; C21D 6/00; C21D 6/005; C21D 6/002; C21D 6/004; C21D 6/02; C21D 6/008; C21D 8/0247 (86) International application number: PCT/IB2020/056787 (87) International publication number: WO 2022/018481 (27.01.2022 Gazette 2022/04)

(84) Designated Contracting States: 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 States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: LHOIST, Vincent 4257 Berloz (BE) HEBERT, Véronique 57070 Saint Julien-les-Metz (FR) SIEBENTRITT, Matthieu 57000 Metz (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra Immeuble Le Cézanne 93200 Saint-Denis 93200 Saint-Denis (FR)