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(11)

EP 3 821 040 A1

(12)

(43) Date of publication: 19.05.2021 Bulletin 2021/20 (21) Application number: 19752261.8 (22) Date of filing: 03.07.2019

(51) International Patent Classification (IPC):  C21D 1/18(2006.01) C21D 1/63(2006.01) C22C 38/02(2006.01) C22C 38/18(2006.01) C22C 38/26(2006.01) C21D 1/60(2006.01) C21D 9/04(2006.01) C22C 38/04(2006.01) C22C 38/24(2006.01) (86) International application number: PCT/IB2019/055660 (87) International publication number: WO 2020/012297 (16.01.2020 Gazette 2020/03)

(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: 10.07.2018 AT 2012018 (71) Applicant: VOESTALPINE RAIL TECHNOLOGY GMBH 8700 Leoben (AT)	(72) Inventors: GORIUPP, Jürgen 8770 St. Michael (AT) KUSS, Mario 8700 Leoben (AT) (74) Representative: Keschmann, Marc  Haffner und Keschmann Patentanwälte GmbH Schottengasse 3a 1010 Wien 1010 Wien (AT)