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EP 4 267 777 A1

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(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21848255.2 (22) Date of filing: 23.12.2021

(51) International Patent Classification (IPC):  C22C 38/38(2006.01) C22C 38/06(2006.01) C22C 38/00(2006.01) C21D 8/02(2006.01) C23C 2/02(2006.01) C22C 38/02(2006.01) C22C 38/34(2006.01) C21D 9/46(2006.01) C21D 6/00(2006.01) C21D 1/26(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/38; C22C 38/02; C22C 38/06; C22C 38/34; C22C 38/001; C21D 9/46; C21D 8/02; C21D 8/0205; C21D 8/0226; C21D 8/0236; C21D 8/0247; C21D 6/002; C21D 6/005; C21D 1/26 (86) International application number: PCT/EP2021/087596 (87) International publication number: WO 2022/136683 (30.06.2022 Gazette 2022/26)

(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: 23.12.2020 SE 2051557 (71) Applicant: voestalpine Stahl GmbH 4020 Linz (AT)	(72) Inventors: SCHWARZENBRUNNER, Michael 4111 Walding (AT) STEINEDER, Katharina 4020 Linz (AT) GRUBER, Martin 4230 Pregarten (AT) MÖRTLBAUER, Thomas 4020 Linz (AT) (74) Representative: Noréns Patentbyrå AB  Box 10198 100 55 Stockholm 100 55 Stockholm (SE)