(19)

(11)

EP 4 263 879 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21839514.3 (22) Date of filing: 16.12.2021

(51) International Patent Classification (IPC):  C21D 1/02(2006.01) B21B 38/00(2006.01) B21B 43/00(2006.01) C21D 6/00(2006.01) C21D 9/46(2006.01) C22C 38/00(2006.01) B21B 37/76(2006.01) B21B 38/04(2006.01) C21D 1/84(2006.01) C21D 8/02(2006.01) C21D 11/00(2006.01) G05B 13/00(2006.01) (52) Cooperative Patent Classification (CPC): B21B 37/76; C21D 11/005; C21D 9/46; C21D 8/0263; C21D 6/00; C21D 1/84; C21D 1/02; C22C 38/00; G05B 15/02 (86) International application number: PCT/EP2021/086338 (87) International publication number: WO 2022/129434 (23.06.2022 Gazette 2022/25)

(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: 17.12.2020 EP 20215222 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventors: BSIBSI, Mustapha 1970 CA IJMUIDEN (NL) SPEETS, Ramon, Cornelis, Jan 1970 CA IJmuiden (NL)