(19)
(11) EP 4 816 578 A1

(12)

(43) Date of publication:
07.10.2026 Bulletin 2026/41

(21) Application number: 24821165.8

(22) Date of filing: 27.11.2024
(51) International Patent Classification (IPC): 
C23C 2/12(2006.01)
C23C 22/07(2006.01)
C21D 1/673(2006.01)
 C23C 2/26(2006.01)
C23C 28/00(2006.01)
(52) Cooperative Patent Classification (CPC):
C23C 22/07; C23C 2/12; C23C 2/26; C21D 1/673; C23C 28/00
(86) International application number:
PCT/IB2024/061936
(87) International publication number:
WO 2025/114913 (05.06.2025 Gazette 2025/23)
(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:
GE KH MA MD TN

(30) Priority: 27.11.2023 WO PCT/IB2023/061926

(71) Applicant: ArcelorMittal
1160 Luxembourg (LU)

(72) Inventors:
  • RACHIELE, Lydia
    57950 Montigny les Metz (FR)
  • GRIGORIEVA, Raisa
    57000 Metz (FR)

(74) Representative: Plaisant, Sophie Marie 
ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra
93200 Saint-Denis
93200 Saint-Denis (FR)

   


(54) A METHOD FOR MANUFACTURING PRESS-HARDENED A STEEL PART PROVIDED WITH AN AL-BASED COATING AND CORRESPONDING STEEL SHEET