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(11)

EP 4 437 146 A2

(12)

(88) Date of publication A3: 10.08.2023 (43) Date of publication: 02.10.2024 Bulletin 2024/40 (21) Application number: 22917087.3 (22) Date of filing: 29.12.2022

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/06; B32B 15/013; C23C 2/06; C23C 2/02; C23C 2/28; C23C 2/16 (86) International application number: PCT/TR2022/051676 (87) International publication number: WO 2023/129088 (06.07.2023 Gazette 2023/27)

(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: 30.12.2021 TR 202121740 (71) Applicant: Eregli Demir ve Celik Fabrikalari T.A.S. 67330 Zonguldak (TR)	(72) Inventors: GÜNDÜZ, O uz 67330 Ere li/Zonguldak (TR) KILIÇ, Yasemin 67330 Ere li/Zonguldak (TR) ÖZY T, Mehmet Bulut 67330 Ere li/Zonguldak (TR) BA KAYA, Ümran 67330 Ere li/Zonguldak (TR) KESK , Gürkan 67330 Ere li/Zonguldak (TR) I IK, Cahit 67330 Ere li/Zonguldak (TR) (74) Representative: Yalçiner Patent and Consulting Ltd.  Tunus Caddesi 85/3-4 Kavaklidere 06680 Ankara 06680 Ankara (TR)