(19)

(11)

EP 4 395 947 A1

(12)

(43) Date of publication: 10.07.2024 Bulletin 2024/28 (21) Application number: 22782966.0 (22) Date of filing: 01.09.2022

(51) International Patent Classification (IPC):  B21D 22/02(2006.01) B21D 37/16(2006.01) (52) Cooperative Patent Classification (CPC): B21D 22/022; B21D 37/16 (86) International application number: PCT/IB2022/058201 (87) International publication number: WO 2023/031838 (09.03.2023 Gazette 2023/10)

(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: 01.09.2021 IN 202131039596 (71) Applicant: Tata Steel Limited Jamshedpur, Jharkhand 831001 (IN)	(72) Inventors: G, Manikandan Jamshedpur Jharkhand 831 001 (IN) RAJU, Dasu Venkat Jamshedpur Jharkhand 831 001 (IN) VERMA, Rahul Kumar Jamshedpur Jharkhand 831 001 (IN) RAJ, Abhishek Jamshedpur Jharkhand 831 001 (IN) (74) Representative: Studio Torta S.p.A.  Via Viotti, 9 10121 Torino 10121 Torino (IT)