(19)

(11)

EP 4 176 104 A1

(12)

(43) Date of publication: 10.05.2023 Bulletin 2023/19 (21) Application number: 21749696.7 (22) Date of filing: 02.07.2021

(51) International Patent Classification (IPC):  C23C 24/00(2006.01) (52) Cooperative Patent Classification (CPC): C23C 2/003; C23C 2/40; C21D 9/564; C21D 9/0012 (86) International application number: PCT/IB2021/055965 (87) International publication number: WO 2022/003646 (06.01.2022 Gazette 2022/01)

(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: 02.07.2020 IT 202000016012 (71) Applicant: Danieli & C. Officine Meccaniche S.p.A. 33042 Buttrio (IT)	(72) Inventors: VIGNOLO, Luciano 33100 Udine (IT) BAZZARO, Gianluca 33033 Codroipo (IT) (74) Representative: Celona, Antonio et al Notarbartolo & Gervasi S.p.A. Viale Achille Papa, 30 20149 Milano 20149 Milano (IT)