EP 3976839 A1 20220406 - PROCESS FOR PRODUCING A HOT-FORMED AND PRESS-HARDENED SHEET STEEL COMPONENT

Title (en)

PROCESS FOR PRODUCING A HOT-FORMED AND PRESS-HARDENED SHEET STEEL COMPONENT

Title (de)

VERFAHREN ZUR HERSTELLUNG EINES WARMUMGEFORMTEN UND PRESSGEHÄRTETEN STAHLBLECHBAUTEILS

Title (fr)

PROCÉDÉ DE FABRICATION D'UNE PIÈCE EN TÔLE D'ACIER FAÇONNÉE À CHAUD ET TREMPÉE À LA PRESSE

Publication

EP 3976839 A1 20220406 (DE)

Application

EP 20729040 A 20200526

Priority

DE 102019208040 A 20190603
EP 2020064610 W 20200526

Abstract (en)

[origin: WO2020244974A1] The invention relates to a steel material comprising a steel alloy having at least the following constituents in per cent by weight: 0.30 to 0.42% carbon; 0.3 to 2.5% manganese; 0.8 to 2.2% silicon; up to 0.06% aluminium; up to 0.5% chromium, nickel and molybdenum together; up to 0.06% niobium; up to 0.1% vanadium; up to 0.01% titanium; 0.001 to 0.01% boron; up to 0.01% nitrogen; up to 0.01% sulfur; up to 0.02% phosphorus; balance: iron and impurities, wherein a microstructure consists of essentially bainite, stabilized residual austenite and martensite.

IPC 8 full level

C21D 1/20 (2006.01); B21D 22/02 (2006.01); C21D 1/25 (2006.01); C21D 1/673 (2006.01); C21D 6/00 (2006.01); C21D 7/02 (2006.01); C21D 7/13 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/18 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01); C23C 4/00 (2016.01)

CPC (source: EP)

C21D 1/20 (2013.01); C21D 1/25 (2013.01); C21D 1/673 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 7/02 (2013.01); C21D 7/13 (2013.01); C21D 8/0463 (2013.01); C21D 9/48 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/12 (2013.01); C22C 38/18 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/54 (2013.01); B21D 22/022 (2013.01); B21D 35/006 (2013.01); C21D 2211/002 (2013.01)

Citation (search report)

See references of WO 2020244974A1

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

DOCDB simple family (publication)

DE 102019208040 A1 20201203; EP 3976839 A1 20220406; WO 2020244974 A1 20201210

DOCDB simple family (application)

DE 102019208040 A 20190603; EP 2020064610 W 20200526; EP 20729040 A 20200526