(19)

(11)

EP 4 126 414 A1

(12)

(43) Date of publication: 08.02.2023 Bulletin 2023/06 (21) Application number: 21720561.6 (22) Date of filing: 26.03.2021

(51) International Patent Classification (IPC):  B21J 5/08(1968.09) B21K 1/06(1968.09) B21J 13/02(1968.09) B21K 21/12(1968.09) (52) Cooperative Patent Classification (CPC): B21J 5/08; B21J 13/02; B21K 1/063; B21K 21/12; B21J 13/025 (86) International application number: PCT/IB2021/052516 (87) International publication number: WO 2021/191850 (30.09.2021 Gazette 2021/39)

(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: 27.03.2020 IN 202033013389 (71) Applicant: Tata Steel Limited Jamshedpur, Jharkhand 831001 (IN)	(72) Inventors: KALUBHAI BHARODIYA, Vishal Jharkhand 831 001 (IN) VINAY SANJAY, Gujre Jharkhand 831 001 (IN) LAKSHMIKANT, Pala Jharkhand 831 001 (IN) KUMAR VERMA, Rahul Jharkhand 831 001 (IN) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)