Global Patent Index - EP 0588342 A1

EP 0588342 A1 19940323 - Grain-oriented electrical steel sheet and material having very high magnetic flux density and method of manufacturing same.

Title (en)

Grain-oriented electrical steel sheet and material having very high magnetic flux density and method of manufacturing same.

Title (de)

Kornorientierte Elektrobleche und Material mit sehr hoher magnetischer Flussdichte und Verfahren zur Herstellung dieser.

Title (fr)

TÔle d'acier électrique à grains orientés et matériau à haute densité de flux magnétique et procédé pour leur fabrication.

Publication

EP 0588342 A1 19940323 (EN)

Application

EP 93114924 A 19930916

Priority

  • JP 24819492 A 19920917
  • JP 28648692 A 19921023

Abstract (en)

Very high magnetic flux density grain-oriented electrical steel sheet containing 2.5 to 4.0 weight percent silicon as an essential component and having a very high magnetic flux density B8 of not less than 1.92 tesla, in which by area not less than 80 percent is accounted for by matrix secondary recrystallization grains having a diameter not larger than 100 mm and not smaller than 10 mm in a direction of cold rolling and not larger than 50 mm and not smaller than 5 mm in a direction perpendicular to the cold rolling direction, and in which, moreover, of the grains in said matrix, not fewer than 50 percent are fine secondary recrystallization grains having an average diameter not larger than 5 mm. <IMAGE>

IPC 1-7

C21D 8/12; C22C 38/02

IPC 8 full level

C21D 8/12 (2006.01); C22C 38/02 (2006.01); H01F 1/147 (2006.01)

CPC (source: EP KR)

C21D 8/12 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP); H01F 1/14775 (2013.01 - EP); C21D 8/1222 (2013.01 - EP); C21D 8/1233 (2013.01 - EP); C21D 8/1261 (2013.01 - EP); C21D 8/1266 (2013.01 - EP); C21D 8/1294 (2013.01 - EP)

Citation (search report)

  • [A] EP 0101321 B1 19901205
  • [A] EP 0339475 A2 19891102 - NIPPON STEEL CORP [JP]
  • [A] EP 0390142 A2 19901003 - NIPPON STEEL CORP [JP]
  • [A] EP 0390140 A1 19901003 - NIPPON STEEL CORP [JP]
  • [A] EP 0315948 A2 19890517 - NIPPON STEEL CORP [JP]
  • [A] US 4642141 A 19870210 - IIDA YOSHIAKI [JP], et al
  • [A] PATENT ABSTRACTS OF JAPAN, unexamined application, C field, vol. 15, no. 231, June 12, 1991 THE PATENT OFFICE JAPANESE GOVERNMENT page 45 C 840
  • [A] PATENT ABSTRACTS OF JAPAN, unexamined applications, C field, vol. 15, no. 7, January 09, 1991 THE PATENT OFFICE JAPANESE GOVERNMENT page 116 C 794
  • [A] PATENT ABSTRACTS OF JAPAN, unexamined applications, C field, vol. 12, no. 11, January 13, 1988 THE PATENT OFFICE JAPANESE GOVERNMENT page 120 C 468
  • [A] CHEMICAL ABSTRACTS, vol. 105, no. 2, July 14, 1986, Columbus, Ohio, USA IGUCHI, MASAO et al. "Direc- tional silicon steel strip with excellent magnetic pro- perties" page 237, column 2, abstract- -no. 10 195t
  • [A] CHEMICAL ABSTRACTS, vol. 117, no. 6, August 10, 1992, Columbus, Ohio, USA YOSHITOMI, YASUNARI et al. "Manufacture of anisotropic electromagnetic steel sheets having improved magnetic pro- perties" page 297, column 1, abstract- -no. 53 362k
  • [A] CHEMICAL ABSTRACTS, vol. 105, no. 2, July 14, 1986, Columbus, Ohio, USA IGUCHI, MASAO et al. "Directional silicon steel strip with excellent magnetic properties" page 2377, column 2, abstract-no. 10 194s

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0588342 A1 19940323; EP 0588342 B1 20000712; DE 69328998 D1 20000817; DE 69328998 T2 20010301; KR 0183408 B1 19990401; KR 940007195 A 19940426

DOCDB simple family (application)

EP 93114924 A 19930916; DE 69328998 T 19930916; KR 930018614 A 19930916