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EP 4 073 280 A1

(12)

(43) Date of publication: 19.10.2022 Bulletin 2022/42 (21) Application number: 20823957.4 (22) Date of filing: 10.12.2020

(51) International Patent Classification (IPC):  C21D 8/00(2006.01) C21D 8/04(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C21D 8/02(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/00; C22C 38/02; C22C 38/04; C22C 38/06; C22C 38/18; C22C 38/22; C22C 38/24; C22C 38/26; C21D 2211/002; C21D 2211/005; C21D 2211/008; C21D 8/00; C21D 8/02; C21D 8/0236; C21D 8/0226; C21D 8/0263; C21D 8/0273; C21D 8/04; C21D 8/0426; C21D 8/0436; C21D 8/0463; C21D 8/0473 (86) International application number: PCT/IB2020/061765 (87) International publication number: WO 2021/116976 (17.06.2021 Gazette 2021/24)

(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: 13.12.2019 WO PCT/IB2019/060741 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: SIEBENTRITT, Matthieu 57000 Metz (FR) LAMOUCHE, Julien 54850 MESSEIN (FR) DE KNIJF, Dorien 9450 Denderhoutem Oost-Vlaanderen (BE) (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)