EP 1154028 A1 20011114 - Multiphase steel and method for its production
Title (en)
Multiphase steel and method for its production
Title (de)
Mehrphasiger Stahl und Herstellungsverfahren
Title (fr)
Acier à plusieurs phases et procédé pour sa fabrication
Publication
Application
Priority
NL 1015184 A 20000512
Abstract (en)
The invention relates to a high-strength steel sheet, which is uncoated or galvanized, and is characterized by a microstructure comprising ferrite and hardening structures, namely martensite, bainite, pearlite and/or residual austenite. The steel has a high work hardening index during static and dynamic deformation. The yield point:tensile strength ratio is low, both during static and dynamic deformation, so that the steel is easy to work. The energy absorption during both static and dynamic deformation with 10-20% elongation is relatively high; it should be noted that 15% elongation is a typical value encountered in the event of a collision. The invention deals with high-strength cold-rolled steel for use in (automotive) components which are suitable for absorbing energy at high speed.
IPC 1-7
IPC 8 full level
C21D 1/18 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C23C 2/02 (2006.01)
CPC (source: EP US)
C21D 1/185 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C23C 2/02 (2013.01 - EP US); C23C 2/0224 (2022.08 - EP US); C23C 2/024 (2022.08 - EP US)
Citation (search report)
- [A] EP 0922777 A1 19990616 - COCKERILL RECH & DEV [BE]
- [A] EP 0429094 A1 19910529 - KOBE STEEL LTD [JP]
- [A] US 4816090 A 19890328 - DOONAN JEFFERY W [AU], et al
- [A] US 4770719 A 19880913 - HASHIGUCHI KOICHI [JP], et al
- [A] US 4398970 A 19830816 - MARDER ARNOLD R [US], et al
- [A] US 4285741 A 19810825 - FURUKAWA TAKASHI, et al
- [A] US 5328528 A 19940712 - CHEN HUANG-CHUAN [TW]
Designated contracting state (EPC)
GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 01201725 A 20010510; NL 1015184 A 20000512