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(11)

EP 4 259 835 A1

(12)

(43) Date of publication: 18.10.2023 Bulletin 2023/42 (21) Application number: 20825255.1 (22) Date of filing: 10.12.2020

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) C22C 38/08(2006.01) C22C 38/16(2006.01) C21D 9/46(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C22C 38/14(2006.01) C22C 38/38(2006.01) (52) Cooperative Patent Classification (CPC): C21D 8/0226; C21D 2211/001; C21D 2211/004; C21D 2211/005; C22C 38/06; C21D 8/0236; C22C 38/04; C21D 8/0273; C21D 8/0205; C22C 38/02; C22C 38/38; C22C 38/08; C22C 38/16; C22C 38/14; C22C 38/005; C22C 38/002; C21D 9/46 (86) International application number: PCT/IB2020/061771 (87) International publication number: WO 2022/123299 (16.06.2022 Gazette 2022/24)

(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 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: LORENZINI, Pascal 57140 Woippy (FR) GARAT, Xavier 57310 Homecourt (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)