(19)

(11)

EP 4 326 913 A1

(12)

(43) Date of publication: 28.02.2024 Bulletin 2024/09 (21) Application number: 22724684.0 (22) Date of filing: 21.04.2022

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/02(2006.01) C22C 38/12(2006.01) C21D 9/46(2006.01) C23C 2/06(2006.01) C23C 2/28(2006.01) B21B 1/22(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) C23C 2/00(2006.01) C23C 2/02(2006.01) C23C 2/12(2006.01) C23C 2/40(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/004; C22C 38/04; C22C 38/02; C22C 38/002; C22C 38/12; C21D 8/0226; C21D 8/0263; C21D 8/0236; C21D 8/0273; C21D 8/0205; C21D 9/46; C23C 2/02; C23C 2/28; C23C 2/40; C23C 2/06; C23C 2/12 (86) International application number: PCT/EP2022/060599 (87) International publication number: WO 2022/223719 (27.10.2022 Gazette 2022/43)

(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: 21.04.2021 EP 21169708 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventors: VAN DER HOEVEN, Job, Anthonius 1970 CA IJMUIDEN (NL) VAN VELDHUIZEN, Hendrik, Bart 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)