(19)

(11)

EP 3 983 568 A1

(12)

(43) Date of publication: 20.04.2022 Bulletin 2022/16 (21) Application number: 20730759.6 (22) Date of filing: 05.06.2020

(51) International Patent Classification (IPC):  C21D 1/22(2006.01) C22C 38/22(2006.01) C22C 38/44(2006.01) C21D 8/02(2006.01) C22C 38/28(2006.01) C22C 38/50(2006.01) (52) Cooperative Patent Classification (CPC): C21D 2211/008; C21D 2211/005; C21D 2211/002; C21D 2211/001; C22C 38/22; C22C 38/28; C22C 38/44; C22C 38/50; C21D 1/22; C21D 8/0226; C21D 8/0236; C21D 8/0247; C21D 8/0273 (86) International application number: PCT/IB2020/055319 (87) International publication number: WO 2020/250098 (17.12.2020 Gazette 2020/51)

(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 (30) Priority: 12.06.2019 WO PCT/IB2019/054901 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventor: ESNAUT, Aurélie 54240 Joeuf (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)