公开(公告)号：EP1281458A4

公开(公告)日：2004-06-09

申请号：EP01930090

申请日：2001-05-11

申请人： NIPPON STEEL CORP

发明人： YAMAMURA HIDEAKI ,  HAMADA NAOYA ,  IZU TADAHIRO ,  KURISU YASUSHI ,  SUICHI ISAO ,  MIYAZAKI MASAFUMI ,  SEKI KAZUMI ,  TAKEUCHI EIICHI ,  YAMADA MAMORU ,  OKA HIDEKI ,  MARUKI YASUO ,  ISHIMARU EIICHIRO ,  NAKAYAMA MITSURU

IPC分类号： B22D11/06 ,  C21D9/573

CPC分类号： B22D11/0651 ,  B22D11/0611 ,  B22D11/0622 ,  B22D11/0665 ,  C21D9/5737

公开(公告)号：EP0706845A4

公开(公告)日：1997-05-02

申请号：EP95913335

申请日：1995-03-24

申请人： NIPPON STEEL CORP

发明人： NAKASHIMA HIROYUKI ,  OKA HIDEKI ,  TAKEUCHI HIDEMARO ,  TANAKA SHIGENORI ,  FUKUDA YOSHIMORI ,  AKAMATSU SATOSHI ,  MIYAZAKI MASAFUMI ,  MATSUMURA YOSHIKAZU

IPC分类号： B22D11/06 ,  B22D11/12

CPC分类号： B22D11/0622 ,  B22D11/0697 ,  B22D11/1213

摘要： In continuous casting of a carbon steel thin strip slab, the present invention makes the scales generated in the slab thin and produces a composition suitable for machining such as cold rolling and pressing. The construction of an apparatus for restricting the occurrence of the scales is simplified, a consumption quantity of an inert gas is saved, and the slab is produced efficiently. A carbon steel containing not greater than 0.5 % of C is cooled and solidified by a pair of cooling drums to produce a thin strip slab having a thickness of not greater than 10 mm, the slab so produced is introduced into a sealed chamber and is held in an argon atmosphere having an oxygen gas concentration of not higher than 5 % within a temperature range of up to at least 1200 DEG C, the temperature range is then cooled to 750 to 800 DEG C at a cooling rate of at least 10 DEG C/sec, and the slab is taken up by a winding machine into a coil within a temperature range of 500 to 800 DEG C. The atmosphere described above is generated by utilizing a nitrogen gas or a combustion waste gas, the formation of the scales is restricted, and the composition is controlled.

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.

公开(公告)号：EP1491274A4

公开(公告)日：2006-04-12

申请号：EP03715555

申请日：2003-03-27

申请人： NIPPON STEEL CORP

发明人： MIYAZAKI MASAFUMI ,  INOUE SHUICHI ,  NISHIMURA T ,  INOUE HIROSHIGE

IPC分类号： B22D11/00 ,  B22D11/06 ,  B22D11/12 ,  B22D11/18

CPC分类号： B22D11/002 ,  B22D11/0622 ,  B22D11/1206

摘要： A method of manufacturing, by casting, an austenitic stainless steel sheet cast piece by continuous casting equipment having mold walls moving in synchronism with the cast piece capable of preventing punctate and staggered marbling uneven brightness found on a steel sheet after cold drawing and cold working, characterized in that a pressing force (P) of the surface of the mold walls against the cast piece is more than 1.0 to less than 2.5 t/m, desirably more than 1.1 to 1.6 t/m or less. The continuous casting equipment of a double drum type, wherein a relation between a drum radius R (m) and the pressing force P (t/m) of the surfaces of the mold walls is 0.5

公开(公告)号：EP0788854A4

公开(公告)日：1999-08-18

申请号：EP96929532

申请日：1996-09-05

申请人： NIPPON STEEL CORP

发明人： OKA HIDEKI ,  ARAI TAKASHI ,  MIYAZAKI MASAFUMI ,  YAMAMURA KAZUTO ,  YAMADA MAMORU

IPC分类号： B22D11/06

CPC分类号： B22D11/0622

摘要： A twin-drum continuous casting method for continuously supplying molten steel between a pair of cooling drums disposed in parallel to each other for solidification thereat and being cast into a thin cast piece wherein at the closest position of the cooling drums, a concave crown amount is imparted to the cooling drums in which the solid phase rate at the thickness-wise centre of a thin cast piece in a range where the distance from an end of the thin cast piece to a central portion is within 50 mm indicates a value equal to or more than a solid phase rate at the fluidity limit or the cooling efficiency in the vicinity of the end portion of the cooling drum is improved.

公开(公告)号：EP1632582A4

公开(公告)日：2007-08-22

申请号：EP04730094

申请日：2004-04-28

申请人： NIPPON STEEL CORP

发明人： OHASHI WATARU ,  KIYOSE AKIHITO ,  MIYAZAKI MASAFUMI ,  KUBOTA TAKESHI ,  KUROSAKI YOUSUKE ,  ARITA YOSHIHIRO ,  MIYAMOTO KEN-ICHIRO ,  SAWAI TAKASHI

IPC分类号： C22C38/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/18 ,  C22C38/58 ,  H01F1/147 ,  H01F1/16 ,  H02K1/02

CPC分类号： C21D8/1205 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  H01F1/14775 ,  H02K1/02

摘要： L'invention porte sur une tôle d'acier magnétique non orientée caractérisée en ce qu'elle présente des inclusions d'un diamètre de moins de 100 nm (en terme de sphère équivalente) d'une densité numérique de 1 X 10 [pièces/mm ] ou moins, et dont la composition chimique en % de la masse est de C: 0,01 % ou moins, Si: 0,1 à 7,0 %, Al: 0,1 % à 3,0 %, Mn: 0,1 à 2,0 %, REM: 0,0003 à 0,05 %, Ti: 0,02 % ou moins, S: 0,005 % ou moins, N: 0,005 % ou moins, et le reliquat de Fe et des impuretés inévitables, pour autant que la composition satisfasse à la formule (1) suivantes: log([Ti]X[N]) 1,19Xlog([Al]X[N]) + 1,84 > 0 --- (1) dans laquelle [Al],[N] et [Ti] représentent respectivement les pourcentages massiques de Al, N et Ti.

公开(公告)号：EP1816226A4

公开(公告)日：2009-10-21

申请号：EP05790122

申请日：2005-09-28

申请人： NIPPON STEEL CORP

发明人： MIYAZAKI MASAFUMI ,  OHASHI WATARU ,  KUROSAKI YOUSUKE ,  KUBOTA TAKESHI ,  HARADA HIROSHI ,  KONNO TOMOHIRO ,  MATSUMOTO YUTAKA ,  KIRISHIKI KOICHI

IPC分类号： C22C38/00 ,  C22C38/14 ,  C22C38/60 ,  H01F1/16

CPC分类号： H01F1/14791 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/16