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EP 4 263 882 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21819985.9 (22) Date of filing: 03.12.2021

(51) International Patent Classification (IPC):  C21D 1/673(2006.01) C21D 8/02(2006.01) C21D 9/46(2006.01) C22C 38/04(2006.01) C22C 38/38(2006.01) C23C 2/12(2006.01) C23C 2/28(2006.01) C21D 6/00(2006.01) C21D 9/40(2006.01) C22C 38/02(2006.01) C22C 38/12(2006.01) C23C 2/02(2006.01) C23C 2/26(2006.01) C23C 2/40(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/12; C22C 38/38; C21D 6/00; C21D 8/02; C21D 9/40; C21D 9/46; C21D 1/673; C23C 2/02; C23C 2/12; C23C 2/26; C23C 2/28; C23C 2/40; C23C 2/29; C23C 2/024; C23C 2/0224 (86) International application number: PCT/IB2021/061291 (87) International publication number: WO 2022/130101 (23.06.2022 Gazette 2022/25)

(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 (30) Priority: 16.12.2020 WO PCT/IB2020/062045 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: PHILIPPOT, Clément 57365 Ennery (FR) LE GUILLARD, Sandra 54800 Mars La Tour (FR) DUSSAUSSOIS, David 54310 Homécourt (FR) SALIB, Matthieu 57283 Maizières-lès-Metz Cedex (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal Research & Development Intellectual Property Immeuble Le Cézanne 6, rue André Campra 93212 La Plaine Saint-Denis 93212 La Plaine Saint-Denis (FR)