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EP 4 423 307 A1

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(43) Date of publication: 04.09.2024 Bulletin 2024/36 (21) Application number: 21807258.5 (22) Date of filing: 28.10.2021

(51) International Patent Classification (IPC):  C22C 38/32(2006.01) C22C 38/02(2006.01) C22C 38/38(2006.01) C22C 38/42(2006.01) C22C 38/46(2006.01) C22C 38/54(2006.01) C21D 8/02(2006.01) C21D 6/00(2006.01) C22C 38/04(2006.01) C22C 38/06(2006.01) C22C 38/00(2006.01) C22C 38/44(2006.01) C22C 38/50(2006.01) C21D 9/46(2006.01) C21D 1/22(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/06; C22C 38/42; C22C 38/001; C22C 38/44; C22C 38/46; C22C 38/54; C22C 38/50; C22C 38/32; C22C 38/38; C21D 9/46; C21D 8/0205; C21D 8/0226; C21D 8/0263; C21D 8/0273; C21D 1/22; C21D 6/004 (86) International application number: PCT/IB2021/059967 (87) International publication number: WO 2023/073406 (04.05.2023 Gazette 2023/18)

(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: MARTINEZ TARANILLA, Laura 48970 BASAURI (ES) DUPREZ, Lode 9050 Gentbrugge (BE) MOLI SANCHEZ, Laura 9000 Ghent (BE) WATERSCHOOT, Tom 9160 Lokeren (BE) KUMAR HATUI, Atish 48901 Barakaldo (ES) (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)