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EP 4 577 675 A1

(12)

(43) Date of publication: 02.07.2025 Bulletin 2025/27 (21) Application number: 23748723.6 (22) Date of filing: 20.07.2023

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/02(2006.01) C22C 38/08(2006.01) C22C 38/16(2006.01) C21D 9/46(2006.01) C22C 38/04(2006.01) C22C 38/12(2006.01) C22C 38/26(2006.01) (52) Cooperative Patent Classification (CPC): C21D 2211/005; C21D 9/46; C21D 8/0263; C21D 8/0226; C21D 8/0205; C22C 38/12; C22C 38/02; C22C 38/04; C22C 38/16; C22C 38/08; C22C 38/26 (86) International application number: PCT/EP2023/070216 (87) International publication number: WO 2024/041820 (29.02.2024 Gazette 2024/09)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 25.08.2022 EP 22192141 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventors: CAMPANIELLO, Jean, Joseph 1970 CA IJmuiden (NL) VAN VEENEN, Willem Jan 1970 CA IJmuiden (NL) (74) Representative: Group Intellectual Property Services  c/o Tata Steel Nederland Technology B.V. P.O. Box 10000 - 3G.37 1970 CA IJmuiden 1970 CA IJmuiden (NL)