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(11)

EP 4 453 265 A1

(12)

(43) Date of publication: 30.10.2024 Bulletin 2024/44 (21) Application number: 22844105.1 (22) Date of filing: 22.12.2022

(51) International Patent Classification (IPC):  C21D 9/08(2006.01) B23K 9/032(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) B21B 37/16(2006.01) B21C 37/12(2006.01) B23K 11/08(2006.01) C22C 38/04(2006.01) F16L 9/16(2006.01) (52) Cooperative Patent Classification (CPC): C21D 9/08; F16L 9/165; B21C 37/122; C21D 2211/005; C22C 38/02; C22C 38/04; C22C 38/06 (86) International application number: PCT/EP2022/087630 (87) International publication number: WO 2023/118516 (29.06.2023 Gazette 2023/26)

(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: 24.12.2021 EP 21217739 (71) Applicant: Tata Steel Nederland Technology B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventors: VAN DER HOEVEN, Job, Anthonius 1970 CA IJmuiden (NL) CRUIJFF, Marcel 1970 CA IJmuiden (NL) VAN DEN BERG, Frenk 1970 CA IJmuiden (NL) VAN DER WEIJDE, Dammes, Hans 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)