EP 1918402 B1 20090527 - Process for manufacturing steel flat products from a steel forming a complex phase structure
Title (en)
Process for manufacturing steel flat products from a steel forming a complex phase structure
Title (de)
Verfahren zum Herstellen von Stahl-Flachprodukten aus einem ein Komplexphasen-Gefüge bildenden Stahl
Title (fr)
Procédé de fabrication de produits plats en acier à partir d'un acier formant une structure de phases complexes
Publication
Application
Priority
EP 06123134 A 20061030
Abstract (en)
[origin: EP1918402A1] The method for the production of flat steel products useful in automotive industry, comprises casting a steel into a cast strip having a thickness of 1-4 mm, hot-rolling the cast strip in-line into a hot-rolled strip having a thickness of higher than 1.5 mm in a continuous process at 900-1100[deg] C, and coiling the hot-rolled strip at 550-620[deg] C to obtain a hot-rolled strip, which has a minimum tensile strength R m of 800 MPa and a minimum breaking elongation A 8 0 of 10%. The hot-rolled strip is cold-rolled with a thickness of 0.5-1.4 mm at 750-850[deg] C to obtain a cold-rolled strip. The method for the production of flat steel products useful in automotive industry, comprises casting a steel into a cast strip having a thickness of 1-4 mm, hot-rolling the cast strip in-line into a hot-rolled strip having a thickness of higher than 1.5 mm in a continuous process at 900-1100[deg] C, and coiling the hot-rolled strip at 550-620[deg] C to obtain a hot-rolled strip, which has a minimum tensile strength R m of 800 MPa and a minimum breaking elongation A 8 0 of 10%. The steel forms a complex phase structure. The shaping degree is greater than 20%. The width of the hot-rolled strip is more than 1.600 mm. The hot-rolled strip is cold-rolled with a thickness of 0.5-1.4 mm at 750-850[deg] C to obtain a cold-rolled strip, which has a minimum tensile strength of 800 MPa and a minimum breaking elongation A 8 0 of 10%. The cold- or hot-rolled strip is provided with a metallic coating, which is galvanizing.
IPC 8 full level
C22C 38/02 (2006.01); B22D 11/00 (2006.01); B22D 11/06 (2006.01); C21D 8/04 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01)
CPC (source: EP KR US)
B22D 11/001 (2013.01 - EP US); B22D 11/06 (2013.01 - EP KR US); C21D 8/04 (2013.01 - KR); C21D 8/0415 (2013.01 - EP US); C21D 8/0426 (2013.01 - EP US); C21D 8/0473 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/14 (2013.01 - KR); C22C 38/28 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1918402 A1 20080507; EP 1918402 B1 20090527; AT E432372 T1 20090615; CN 101528969 A 20090909; CN 101528969 B 20120111; DE 502006003830 D1 20090709; ES 2325960 T3 20090925; JP 2010508433 A 20100318; JP 5232793 B2 20130710; KR 101458039 B1 20141103; KR 20090090300 A 20090825; PL 1918402 T3 20091030; US 2009277546 A1 20091112; WO 2008052917 A1 20080508
DOCDB simple family (application)
EP 06123134 A 20061030; AT 06123134 T 20061030; CN 200780040070 A 20071024; DE 502006003830 T 20061030; EP 2007061388 W 20071024; ES 06123134 T 20061030; JP 2009533820 A 20071024; KR 20097007483 A 20071024; PL 06123134 T 20061030; US 44762607 A 20071024