EP 1918406 B1 20090527 - Process for manufacturing steel flat products from boron microalloyed multi phase steel
Title (en)
Process for manufacturing steel flat products from boron microalloyed multi phase steel
Title (de)
Verfahren zum Herstellen von Stahl-Flachprodukten aus einem mit Bor mikrolegierten Mehrphasenstahl
Title (fr)
Procédé pour la fabrication de produits plats à partir d'un acier à plusieurs phases micro-allié en bore
Publication
Application
Priority
EP 06123139 A 20061030
Abstract (en)
[origin: EP1918406A1] The method for the production of flat steel products useful for 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 a final hot-rolling temperature at 800-1100[deg] C and coiling the hot-rolled strip at a coiling temperature of 250-570[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 5%. The method for the production of flat steel products useful for 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 a final hot-rolling temperature of 800-1100[deg] C and coiling the hot-rolled strip at a coiling temperature of 250-570[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 5%. 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 5 0 of 10%. The cold or hot-rolled strip is provided with a metallic coating, which is galvanizing. The hot-rolled temperature is 900-1020[deg] C and the coiling temperature is 420-490[deg] C, when the minimum breaking elongation A 8 0 of the obtained hot-rolled strip is 10%. The hot-rolled temperature is 900-1100[deg] C and the coiling temperature is 450-570[deg] C, when the minimum tensile strength of the obtained hot-rolled strip is 1000 MPa.
IPC 8 full level
C22C 38/04 (2006.01); B22D 11/00 (2006.01); B22D 11/06 (2006.01); C21D 8/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR US)
B22D 11/001 (2013.01 - EP KR US); B22D 11/06 (2013.01 - EP KR US); C21D 8/0415 (2013.01 - EP US); C21D 8/0426 (2013.01 - EP KR US); C21D 8/0436 (2013.01 - EP KR US); C21D 8/0473 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/28 (2013.01 - EP KR US); C22C 38/32 (2013.01 - KR); C22C 38/38 (2013.01 - EP KR US); C21D 2211/008 (2013.01 - EP KR 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 1918406 A1 20080507; EP 1918406 B1 20090527; AT E432376 T1 20090615; CN 101528970 A 20090909; CN 101528970 B 20121003; DE 502006003835 D1 20090709; ES 2325962 T3 20090925; JP 2010508435 A 20100318; JP 5350253 B2 20131127; KR 101461583 B1 20141113; KR 20090084815 A 20090805; PL 1918406 T3 20091030; US 2010043513 A1 20100225; WO 2008052919 A1 20080508
DOCDB simple family (application)
EP 06123139 A 20061030; AT 06123139 T 20061030; CN 200780039440 A 20071024; DE 502006003835 T 20061030; EP 2007061390 W 20071024; ES 06123139 T 20061030; JP 2009533822 A 20071024; KR 20097007485 A 20071024; PL 06123139 T 20061030; US 44762107 A 20071024