公开(公告)号：EP1170388A4

公开(公告)日：2004-03-24

申请号：EP00981824

申请日：2000-12-19

申请人： NIPPON KOKAN KK ,  SONY CORP

发明人： KODAMA SATOSHI ,  SUGIHARA REIKO ,  MATSUOKA HIDEKI ,  TAMAKA YASUSHI ,  HIRATANI TATSUHIKO ,  TAHARA KENJI ,  MITSUZUKA KENICHI ,  TAKAYANAGI KENICHERO ,  OKADA MASAMICHI ,  KATO HIROAKI ,  SATO CHOHACHI

IPC分类号： C21D8/02 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  H01J9/14 ,  H01J29/07

CPC分类号： C22C38/04 ,  C21D8/0236 ,  C21D8/1233 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/12 ,  H01J9/142 ,  H01J2229/0733

摘要： A method for producing a steel sheet for a tension mask which comprises the steps of hot rolling a steel having the chemical composition in wt.%: C: less than 0.1 %, Si: 0.05 % or less, Mn: 0.4 to 2 %, P: 0.03 % or less, S: 0.03 % or less, sol.Al: 0.01 % or less, N: 0.01 % or more, balance: substantially Fe, cold rolling the hot rolled steel sheet followed by annealing, and subjecting the resulting steel sheet to a secondary cold rolling at a reduction in thickness of 35 % or more. A steel sheet produced by the use of the above method exhibits excellent resistance to creep in blackening processing and also has an excellent magnetic shielding property such that it exhibits a non-hysteresis magnetic permeability of 3400 or more at a DC bias magnetic field of 0.35 Oe, and thus causes no color divergence when used for a tension mask.

公开(公告)号：EP1126041A4

公开(公告)日：2009-06-03

申请号：EP00951940

申请日：2000-08-10

申请人： JFE STEEL CORP ,  SONY CORP

发明人： SUGIHARA REIKO ,  HIRATANI TATSUHIKO ,  MATSUOKA HIDEKI ,  TANAKA YASUSHI ,  KODAMA SATOSHI ,  TAHARA KENJI ,  TAKADA YASUYUKI ,  MITSUZUKA KENICHI

IPC分类号： C22C38/00 ,  C21D8/12 ,  C22C38/04 ,  C22C38/18 ,  C22C38/32 ,  C23C2/02 ,  H01F1/147 ,  H01J29/02 ,  H01J29/06

CPC分类号： H01F1/14716 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C21D8/1277 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/32 ,  C23C2/02 ,  H01F1/147 ,  H01J29/06 ,  Y10T29/301 ,  Y10T29/302 ,  Y10T428/12854 ,  Y10T428/12944 ,  Y10T428/12972 ,  Y10T428/26 ,  Y10T428/32

摘要： A magnetic shielding steel sheet which contains C in an amount of 0.15 wt % or less, has a thickness of 0.05 mm to 0.5 mm, and a non-hysteresis magnetic permeability of 7500 or more.