EP 2733228 A4 20150812 - HOT PRESS FORMING STEEL PLATE, FORMED MEMBER USING SAME, AND METHOD FOR MANUFACTURING THE PLATE AND MEMBER
Title (en)
HOT PRESS FORMING STEEL PLATE, FORMED MEMBER USING SAME, AND METHOD FOR MANUFACTURING THE PLATE AND MEMBER
Title (de)
HEISSPRESSFORMUNG EINER STAHLPLATTE, DARAUS GEFORMTES ELEMENT SOWIE VERFAHREN ZUR HERSTELLUNG DER PLATTE UND DES ELEMENTS
Title (fr)
PLAQUE D'ACIER POUR FORMAGE PAR PRESSAGE À CHAUD, ÉLÉMENT FORMÉ À L'AIDE DE CELLE-CI ET PROCÉDÉ DE FABRICATION DE LA PLAQUE ET DE L'ÉLÉMENT
Publication
Application
Priority
KR 2011005242 W 20110715
Abstract (en)
[origin: EP2733228A1] The present invention relates to a hot press forming steel plate made of a composition comprising: 0.3-1.0 wt % of C; 0.01-4.0 wt % of Mn; 1.0-2.0 wt % of Si; 0.01-2.0 wt % of Al; 0.015 wt % or less of S; 0.01 wt % or less of N; and the remainder being Fe and unavoidable impurities. Further, the present invention relates to a method for manufacturing the hot press forming steel plate, characterized by comprising the steps of: heating, to between 1100 and 1300°C, a steel slab having the composition; performing hot rolling finishing between an Ar3 transformation point and 950°C; and performing winding between MS and 720°C. Further, the present invention relates to a hot press formed member characterized by having the composition, and having a dual phase microstructure made of bainite and residual austenite. In addition, the present invention relates to a method for manufacturing the hot press formed member, characterized by comprising the steps of: heating the steel plate having the composition to a temperature of an Ac3 point or higher; hot press molding the heated steel plate; performing cooling at a cooling speed of 20°C/sec or higher to a temperature between MS and 550°C; and performing a heat treatment in a heating furnace between MS and 550°C.
IPC 8 full level
C22C 38/00 (2006.01); B21B 3/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/58 (2006.01); C23C 2/04 (2006.01)
CPC (source: EP US)
B21B 1/026 (2013.01 - US); B21C 47/26 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C23C 2/02 (2013.01 - EP US); C23C 2/0224 (2022.08 - EP US); C23C 2/024 (2022.08 - EP US); C23C 2/06 (2013.01 - EP US); C23C 2/12 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 8/0273 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); Y10T 428/12757 (2015.01 - EP US); Y10T 428/12799 (2015.01 - EP US)
Citation (search report)
- [XAY] KR 20100091243 A 20100818 - NIPPON STEEL CORP [JP]
- [XAY] JP 2007113100 A 20070510 - NIPPON STEEL CORP
- [Y] US 2009238715 A1 20090924 - CHO YEOL-RAE [KR], et al
- [X] EP 2325346 A1 20110525 - JFE STEEL CORP [JP]
- [X] US 5454887 A 19951003 - FUKUI KIYOSHI [JP]
- See references of WO 2013012103A1
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 2733228 A1 20140521; EP 2733228 A4 20150812; EP 2733228 B1 20190619; CN 103687973 A 20140326; CN 103687973 B 20160831; JP 2014520961 A 20140825; US 2014150930 A1 20140605; WO 2013012103 A1 20130124
DOCDB simple family (application)
EP 11869574 A 20110715; CN 201180072328 A 20110715; JP 2014520100 A 20110715; KR 2011005242 W 20110715; US 201114232784 A 20110715