EP 3366797 A1 20180829 - METHOD FOR PRODUCING A HOT PRESS MEMBER
Title (en)
METHOD FOR PRODUCING A HOT PRESS MEMBER
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES HEISSPRESSELEMENT
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN ÉLÉMENT DE PRESSE À CHAUD
Publication
Application
Priority
- JP 2015205751 A 20151019
- JP 2016004458 W 20161003
Abstract (en)
A hot pressed member having all of: high strength of 1500 MPa or more in tensile strength TS; high ductility of 6.0 % or more in uniform elongation uEl; and excellent heat treatment hardenability of increasing in yield stress YS by 150 MPa or more when subjected to heat treatment (baking finish) is provided. A hot pressed member comprises: a predetermined chemical composition (in particular, low C of 0.090 % or more and less than 0.30 % and high Mn of 3.5 % or more and less than 11.0 %); a microstructure including a martensite phase of 70.0 % or more in volume fraction and a retained austenite phase of 3.0 % or more and 30.0 % or less in volume fraction; and a dislocation density of 1.0 × 10 16 /m 2 or more.
IPC 8 full level
C22C 38/00 (2006.01); B21D 22/20 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C21D 9/46 (2006.01); C22C 18/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/60 (2006.01); C23C 2/02 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C23C 2/06 (2006.01); C23C 2/12 (2006.01)
CPC (source: EP KR US)
B21D 22/20 (2013.01 - KR); C21D 1/18 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 8/0205 (2013.01 - KR); C21D 8/0226 (2013.01 - KR); C21D 8/0236 (2013.01 - KR); C21D 8/0263 (2013.01 - EP KR US); C21D 8/0268 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 18/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (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); C23C 2/0224 (2022.08 - EP KR US); C23C 2/024 (2022.08 - EP KR US); C23C 2/06 (2013.01 - EP KR US); C23C 2/12 (2013.01 - EP US); C23C 2/28 (2013.01 - EP KR US); C23C 2/40 (2013.01 - EP US); C23C 30/005 (2013.01 - KR); B21D 22/208 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP KR 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
DOCDB simple family (publication)
EP 3366797 A1 20180829; EP 3366797 A4 20180829; EP 3366797 B1 20191218; CN 108138289 A 20180608; JP 2017078188 A 20170427; JP 6222198 B2 20171101; KR 20180063303 A 20180611; MX 2018004772 A 20180530; US 2019093191 A1 20190328; WO 2017068756 A1 20170427
DOCDB simple family (application)
EP 16857079 A 20161003; CN 201680061022 A 20161003; JP 2015205751 A 20151019; JP 2016004458 W 20161003; KR 20187013032 A 20161003; MX 2018004772 A 20161003; US 201615768894 A 20161003