EP 2733228 B1 20190619 - HOT PRESS FORMED MEMBER AND METHOD FOR MANUFACTURING THE MEMBER
Title (en)
HOT PRESS FORMED MEMBER AND METHOD FOR MANUFACTURING THE MEMBER
Title (de)
HEISSPRESSGEFORMTES ELEMENT SOWIE VERFAHREN ZUR HERSTELLUNG DES ELEMENTS
Title (fr)
ÉLÉMENT FORMÉ PAR PRESSAGE À CHAUD ET PROCÉDÉ DE FABRICATION 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
B21C 47/26 (2006.01); B21B 1/02 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (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 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 2/12 (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 (examination)
EP 2719786 A1 20140416 - KOBE STEEL LTD [JP]
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