EP 2840159 B1 20170510 - Method for producing a steel component
Title (en)
Method for producing a steel component
Title (de)
Verfahren zum Herstellen eines Stahlbauteils
Title (fr)
Procédé destiné à la fabrication d'un composant en acier
Publication
Application
Priority
EP 13181374 A 20130822
Abstract (en)
[origin: WO2015024903A1] The invention relates to a method for the simple production of a steel component of complex configuration having a tensile strength rm > 1200 mpa and a breaking elongation A50 > 6%. To this end, according to the invention, a flat steel product is provided, which, apart from iron and unavoidable impurities, contains (in weight percent): C: 0.10 - 0.60 %, Si: 0.4 - 2.5 %, AI: up to 3.0 %, Mn: 0.4 - 3.0 %, Ni: up to 1 %, Cu: up to 2.0 %, Mo: up to 0.4 %, Cr: up to 2 %, Co: up to 1.5 %, Ti: up to 0.2 %, Nb: up to 0.2 %, V: up to 0.5 %, wherein the the microstructure of the flat steel product is composed of at least 10 vol-% of residual austenite, which comprises globular residual austenite islands having a grain size of at least 1 μm. The flat steel product is heated to a forming temperature of 150 - 400 ⁰C, and at the forming temperature having a degree of deformation, which is at most equal to the uniform elongation ag, is shaped into the component. Finally, the flat steel product such produced is cooled down. A component formed in this way at increased temperatures has a considerably increased strength as compared to a component formed of the same flat steel product but at room temperature.
IPC 8 full level
C21D 7/10 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01)
CPC (source: EP KR US)
C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/02 (2013.01 - KR); C21D 8/0205 (2013.01 - EP US); C21D 8/0221 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/40 (2013.01 - KR); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - KR); C22C 38/46 (2013.01 - KR); C22C 38/48 (2013.01 - KR); C22C 38/50 (2013.01 - KR); C22C 38/52 (2013.01 - KR); C22C 38/58 (2013.01 - EP US); C23C 30/005 (2013.01 - US); C21D 7/10 (2013.01 - EP US); C21D 9/0068 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP 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
DOCDB simple family (publication)
EP 2840159 A1 20150225; EP 2840159 B1 20170510; EP 2840159 B8 20170719; CN 105518175 A 20160420; CN 105518175 B 20170711; ES 2636780 T3 20171009; JP 2016530403 A 20160929; JP 2019151932 A 20190912; JP 6606075 B2 20191113; KR 20160047495 A 20160502; US 10301700 B2 20190528; US 2016201157 A1 20160714; WO 2015024903 A1 20150226
DOCDB simple family (application)
EP 13181374 A 20130822; CN 201480046408 A 20140818; EP 2014067571 W 20140818; ES 13181374 T 20130822; JP 2016535447 A 20140818; JP 2019072123 A 20190404; KR 20167006903 A 20140818; US 201414913592 A 20140818