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EP 4 355 920 A1

(12)

(43) Date of publication: 24.04.2024 Bulletin 2024/17 (21) Application number: 21734517.2 (22) Date of filing: 16.06.2021

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C22C 38/22(2006.01) C22C 38/26(2006.01) C22C 38/32(2006.01) C22C 38/44(2006.01) C22C 38/48(2006.01) C21D 1/18(2006.01) C21D 9/52(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) C22C 38/18(2006.01) C22C 38/24(2006.01) C22C 38/28(2006.01) C22C 38/40(2006.01) C22C 38/46(2006.01) C22C 38/54(2006.01) C21D 8/06(2006.01) (52) Cooperative Patent Classification (CPC): C21D 8/0236; C21D 8/0263; C21D 8/0273; C22C 38/02; C22C 38/04; C22C 38/06; C22C 38/001; C22C 38/18; C22C 38/22; C22C 38/24; C22C 38/26; C22C 38/28; C22C 38/32; C22C 38/40; C22C 38/44; C22C 38/46; C22C 38/48; C22C 38/54; C21D 2211/001; C21D 2211/002; C21D 2211/008; C21D 1/18; C21D 1/20; C21D 8/0436; C21D 8/0463; C21D 8/0473; C21D 8/06; C21D 9/52 (86) International application number: PCT/IB2021/055331 (87) International publication number: WO 2022/263887 (22.12.2022 Gazette 2022/51)

(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: FROTEY, Marion 54910 Valleroy (FR) RESIAK, Bernard 57140 Saulny (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)