(19)

(11)

EP 3 853 387 A1

(12)

(43) Date of publication: 28.07.2021 Bulletin 2021/30 (21) Application number: 19772880.1 (22) Date of filing: 17.09.2019

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C21D 9/46(2006.01) C22C 38/04(2006.01) (86) International application number: PCT/IB2019/057795 (87) International publication number: WO 2020/058829 (26.03.2020 Gazette 2020/13)

(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: 20.09.2018 WO PCT/IB2018/057253 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventor: ALIBEIGI, Samaneh 57000 Metz (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra 93200 Saint-Denis 93200 Saint-Denis (FR)