Global Patent Index - EP 1154028 A1

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

EP 1154028 A1 20011114 (EN)

Application

EP 01201725 A 20010510

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

C22C 38/04; C22C 38/12; C21D 1/18; C21D 8/02

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)

Designated contracting state (EPC)

GB

DOCDB simple family (publication)

EP 1154028 A1 20011114; NL 1015184 C2 20011113

DOCDB simple family (application)

EP 01201725 A 20010510; NL 1015184 A 20000512