EP 4355920 A1 20240424 - METHOD FOR PRODUCING A STEEL PART AND STEEL PART
Title (en)
METHOD FOR PRODUCING A STEEL PART AND STEEL PART
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES STAHLTEILS UND STAHLTEIL
Title (fr)
PROCÉDÉ DE PRODUCTION D'UNE PIÈCE EN ACIER, ET PIÈCE EN ACIER
Publication
Application
Priority
IB 2021055331 W 20210616
Abstract (en)
[origin: WO2022263887A1] Method for producing a steel part comprising by weight: 0.05% ≤ C ≤ 0.15%, 0.01% ≤ Si ≤ 1%, 1.2% ≤ Mn ≤ 2%, 0.1% ≤ Cr ≤ 2%, 0.001 ≤ Al ≤ 0.1%, 0.003% ≤ N ≤ 0.01%, 0 ≤ S ≤ 0.015%, 0 ≤ P ≤ 0.015%,0% ≤ Ni ≤ 1%,0% ≤ B ≤ 0.01%, 0% ≤ Mo ≤ 1%, 0% ≤ Ti ≤ 0.04 %, 0% ≤ Nb ≤ 0.1%, 0 ≤ V ≤ 0.5% the remainder consisting of iron and unavoidable impurities, annealing this semi-finished product at an annealing temperature strictly lower than the Ac1 temperature of the steel; cooling it down to room temperature; cold forming the semi-finished product into a cold formed product; subjecting the cold formed product to a heat treatment comprising heating the cold formed product to a heat treatment temperature greater than or equal to the full austenitisation temperature Ac3 of the steel; and quenching to room temperature; optionally reheating the product at a holding temperature from 180°C to 400°C for a time from 15 minutes to 2 hours.
IPC 8 full level
C21D 8/02 (2006.01); C21D 1/18 (2006.01); C21D 8/06 (2006.01); C21D 9/52 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/40 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR)
C21D 1/18 (2013.01 - EP KR); C21D 8/0236 (2013.01 - EP); C21D 8/0247 (2013.01 - KR); C21D 8/0263 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C21D 8/06 (2013.01 - EP); C21D 9/52 (2013.01 - EP KR); C22C 38/001 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP KR); C22C 38/18 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP); C22C 38/26 (2013.01 - EP); C22C 38/28 (2013.01 - EP); C22C 38/32 (2013.01 - EP); C22C 38/40 (2013.01 - EP); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP KR); C22C 38/50 (2013.01 - KR); C22C 38/54 (2013.01 - EP KR); C22C 38/58 (2013.01 - KR); C23C 22/07 (2013.01 - KR); C21D 1/20 (2013.01 - EP); C21D 8/0436 (2013.01 - EP); C21D 8/0463 (2013.01 - EP); C21D 8/0473 (2013.01 - EP); C21D 2211/001 (2013.01 - EP KR); C21D 2211/002 (2013.01 - EP KR); C21D 2211/008 (2013.01 - EP KR)
Designated contracting state (EPC)
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 state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022263887 A1 20221222; BR 112023024874 A2 20240215; CA 3220321 A1 20221222; CN 117441033 A 20240123; EP 4355920 A1 20240424; KR 20240007218 A 20240116
DOCDB simple family (application)
IB 2021055331 W 20210616; BR 112023024874 A 20210616; CA 3220321 A 20210616; CN 202180099057 A 20210616; EP 21734517 A 20210616; KR 20237042447 A 20210616