EP 4347903 A1 20240410 - HOT-FORMED STEEL PART AND MANUFACTURING METHOD
Title (en)
HOT-FORMED STEEL PART AND MANUFACTURING METHOD
Title (de)
WARMGEFORMTES STAHLTEIL UND HERSTELLUNGSVERFAHREN
Title (fr)
PIÈCE EN ACIER MISE EN FORME À CHAUD ET PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- FR 2105812 A 20210602
- EP 2022064945 W 20220601
Abstract (en)
[origin: WO2022253912A1] The invention relates to a hot-formed steel part having a composition consisting of 0.22%≤C≤0.35%, 0.50%≤Mn≤1.70%; 0.50%≤Cr≤1.70%; traces≤Mo≤0.15%; traces≤Si≤0.40%; traces≤Ni≤0.50%; traces≤Cu≤0.50%; traces≤V≤0.08%; traces≤Al≤0.10%; 0.001%≤B≤0.010%; 0.01%≤Ti≤0.06%; traces≤Nb≤0.05%; traces≤S≤0.15%; traces≤Ca≤0.010%; traces≤Te≤0.030%; traces≤Se≤0.050%; traces≤Bi≤0.050%; traces≤Pb≤0.100%; traces≤P≤0.100%; traces≤N≤0.013%; with 540≤(830- 270*C%-90*Mn%-70*Cr%-83*Mo%-37*Ni%)≤600 and Ti%≥2.5N%. The microstructure consists of at least 70% bainitic ferrite and carbides or residual austenite, the residual austenite fraction being at most 10%, at most 30% martensite and/or proeutectoid ferrite and/or pearlite, the proeutectoid ferrite and/or pearlite fraction being at most 10%.
IPC 8 full level
C21D 1/10 (2006.01); C21D 1/20 (2006.01); C21D 1/30 (2006.01); C21D 7/08 (2006.01); C22C 38/02 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C21D 1/10 (2013.01 - EP KR US); C21D 1/20 (2013.01 - EP KR US); C21D 1/30 (2013.01 - EP KR US); C21D 7/08 (2013.01 - EP KR); C21D 8/0226 (2013.01 - KR); C21D 8/0236 (2013.01 - KR); C22C 38/001 (2013.01 - KR US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/06 (2013.01 - KR US); C22C 38/28 (2013.01 - EP); C22C 38/32 (2013.01 - EP); C22C 38/38 (2013.01 - EP); C22C 38/42 (2013.01 - KR US); C22C 38/44 (2013.01 - KR US); C22C 38/46 (2013.01 - KR US); C22C 38/48 (2013.01 - KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C22C 38/58 (2013.01 - KR US); C22C 38/60 (2013.01 - US); C21D 2211/001 (2013.01 - KR US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - KR US); C21D 2211/008 (2013.01 - EP KR US); C21D 2211/009 (2013.01 - US)
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)
FR 3123659 A1 20221209; BR 112023025290 A2 20240227; EP 4347903 A1 20240410; KR 20240018573 A 20240213; US 2024254610 A1 20240801; WO 2022253912 A1 20221208
DOCDB simple family (application)
FR 2105812 A 20210602; BR 112023025290 A 20220601; EP 2022064945 W 20220601; EP 22731603 A 20220601; KR 20247000114 A 20220601; US 202218565931 A 20220601