EP 2670870 B1 20160120 - PROCESS FOR PRODUCING HIGH STRENGTH STEEL
Title (en)
PROCESS FOR PRODUCING HIGH STRENGTH STEEL
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOCHFESTEM STAHL
Title (fr)
PROCÉDÉ DE FABRICATION D'ACIER À RÉSISTANCE ÉLEVÉE
Publication
Application
Priority
- EP 11152816 A 20110131
- EP 11162332 A 20110413
- EP 2012051566 W 20120131
- EP 12708776 A 20120131
Abstract (en)
[origin: WO2012104306A1] Process for producing a high strength steel, wherein the process comprises producing a vacuum-degassed steel melt, wherein the target oxygen content of the melt at the end of the ladle treatment is obtained by measuring the actual oxygen content of the melt and the oxygen level is adjusted by adding Al and/or Zr whereby the excess addition of Al should be avoided and the target oxygen content of the melt at the end of the ladle treatment is at most 100 ppm. Upon casting the steel a strip or slab is obtained of ultra-low carbon steel comprising at most 0.002 % of acid soluble Al and at most 0.004 % Si and a total oxygen content of at most 150 ppm.
IPC 8 full level
C21C 7/10 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 1/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP)
C21C 7/10 (2013.01); C21D 8/0205 (2013.01); C21D 8/0426 (2013.01); C21D 8/0436 (2013.01); C21D 8/0468 (2013.01); C21D 9/46 (2013.01); C22C 1/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01)
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)
WO 2012104306 A1 20120809; EP 2670870 A1 20131211; EP 2670870 B1 20160120; ES 2561090 T3 20160224
DOCDB simple family (application)
EP 2012051566 W 20120131; EP 12708776 A 20120131; ES 12708776 T 20120131