EP 2762577 A4 20140924 - PREPARATION METHOD OF STEEL PRODUCT HAVING DIFFERENT STRENGTHS USING LASER HEAT TREATMENT, AND HEAT HARDENED STEEL USED THEREIN
Title (en)
PREPARATION METHOD OF STEEL PRODUCT HAVING DIFFERENT STRENGTHS USING LASER HEAT TREATMENT, AND HEAT HARDENED STEEL USED THEREIN
Title (de)
HERSTELLUNGSVERFAHREN FÜR EIN STAHLPRODUKT MI5 UNTERSCHIEDLICHEN STÄRKEN MITTELS LASERWÄRMEBEHANDLUNG UND WÄRMEGEHÄRTETER STAHL DAFÜR
Title (fr)
PROCÉDÉ DE PRÉPARATION D'UN PRODUIT D'ACIER AYANT DIFFÉRENTES RÉSISTANCES À L'AIDE D'UN TRAITEMENT PAR CHAUFFAGE LASER ET ACIER DURCI PAR CHAUFFAGE UTILISÉ DANS CE PROCÉDÉ
Publication
Application
Priority
- KR 20110100174 A 20110930
- KR 2011007703 W 20111017
Abstract (en)
[origin: EP2762577A1] Disclosed are a preparation method of a steel product capable of local reinforcement using laser heat treatment, and a heat hardened steel used in the method. According to the present invention, the preparation method of a steel part comprises the following steps: (a) preparing a material comprising 0.1-0.5 wt% of C, 0.1-0.5 wt% of Si, 0.5-3.0 wt% of Mn, 0.1 wt% or less of P, 0.05 wt% or less of S, 0.01-1.0 wt% of Cr, 0.1 wt% or less of Al, 0.2 wt% or less of Ti, 0.0005-0.08 wt% of B, and the balance of Fe and inevitable impurities; (b) preparing a formed product by forming the material into a predetermined shape; and (c) locally reinforcing the high strength portion by carrying out laser heat treatment on a portion requiring high strength at the formed product.
IPC 8 full level
C21D 1/09 (2006.01); C22C 38/38 (2006.01); C23C 2/04 (2006.01)
CPC (source: EP KR US)
C21D 1/09 (2013.01 - EP KR US); C21D 1/34 (2013.01 - EP US); C21D 9/0068 (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 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/38 (2013.01 - EP KR US); C23C 2/04 (2013.01 - KR); C21D 2221/00 (2013.01 - EP US); Y10T 428/12674 (2015.01 - EP US); Y10T 428/12757 (2015.01 - EP US); Y10T 428/12799 (2015.01 - EP US); Y10T 428/12937 (2015.01 - EP US); Y10T 428/31678 (2015.04 - EP US)
Citation (search report)
- [Y] WO 2011056923 A1 20110512 - JOHNSON CONTROLS TECH CO [US], et al
- [Y] KR 101033767 B1 20110509 - HYUNDAI HYSCO [KR]
- [I] EP 0585843 A2 19940309 - TOYOTA MOTOR CO LTD [JP], et al
- [A] FR 2825375 A1 20021206 - RENAULT [FR]
- [XI] AXEL JAHN ET AL: "Local Laser Strengthening of Steel Sheets for Load Adapted Component Design in Car Body Structures", PHYSICS PROCEDIA, vol. 12, 15 April 2011 (2011-04-15), pages 431 - 441, XP028379988, ISSN: 1875-3892, [retrieved on 20110415], DOI: 10.1016/J.PHPRO.2011.03.054
- [Y] FAN D W ET AL: "Critical review of hot stamping technology for automotive steels", MATERIALS SCIENCE AND TECHNOLOGY CONFERENCE AND EXHIBITION, MS AND T'07,, vol. 1, 1 September 2007 (2007-09-01), pages 98 - 109, XP009176188
- See references of WO 2013047939A1
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 2762577 A1 20140806; EP 2762577 A4 20140924; EP 2762577 B1 20160427; CN 103842527 A 20140604; JP 2014534334 A 20141218; JP 5898772 B2 20160406; KR 101119173 B1 20120222; US 2014227553 A1 20140814; US 2015211086 A1 20150730; WO 2013047939 A1 20130404
DOCDB simple family (application)
EP 11873399 A 20111017; CN 201180073901 A 20111017; JP 2014533173 A 20111017; KR 2011007703 W 20111017; KR 20110100174 A 20110930; US 201114343955 A 20111017; US 201514683933 A 20150410