公开(公告)号：EP1952913A4

公开(公告)日：2009-12-23

申请号：EP06822966

申请日：2006-10-27

申请人： NIPPON STEEL CORP

发明人： MIYAZAKI MASAFUMI ,  MATSUZAWA AKIHIRO ,  SASAI KATSUHIRO ,  OHASHI WATARU ,  OHTANI YASUHIKO ,  YAMADA KATSUNORI ,  DOKI MASAHIRO ,  HIRATA GO ,  KIMURA YOSHIAKI ,  HASEGAWA HAJIME

IPC分类号： B22D11/00 ,  B22D11/10 ,  B22D11/117 ,  C21C7/04

CPC分类号： B22D11/108 ,  B22D11/117 ,  B22D41/58 ,  C21C7/0006 ,  C21C7/068 ,  C21C7/072 ,  Y02P10/212

摘要： A method of production of an ultralow carbon cast slab characterized by adding Ti to molten steel decarburized to a carbon concentration of 0.01 mass% or less, further adding at least one of Ce, La, and Nd, and using an immersion nozzle to inject the above molten steel from a tundish to a casting mold for continuous casting while maintaining a flow rate of Ar gas blown from any location in a range from a tundish upper nozzle to discharge ports of said immersion nozzle at 3N1 (normal liter)/min or less.