Global Patent Index - EP 1415008 A1

EP 1415008 A1 20040506 - NON-GRAIN ORIENTED ELECTRIC SHEET STEEL OR STRIP AND METHOD FOR THE PRODUCTION THEREOF

Title (en)

NON-GRAIN ORIENTED ELECTRIC SHEET STEEL OR STRIP AND METHOD FOR THE PRODUCTION THEREOF

Title (de)

NICHTKORNORIENTIERTES ELEKTROBLECH ODER -BAND UND VERFAHREN ZU SEINER HERSTELLUNG

Title (fr)

TOLE OU BANDE MAGNETIQUE A GRAINS NON ORIENTES ET PROCEDE DE FABRICATION DE LADITE TOLE OU BANDE

Publication

EP 1415008 A1 20040506 (DE)

Application

EP 02754991 A 20020810

Priority

  • DE 10139699 A 20010811
  • DE 10157888 A 20011126
  • DE 10159501 A 20011204
  • EP 0208979 W 20020810

Abstract (en)

[origin: WO03014404A1] The invention relates to a non-grain oriented electric sheet steel or strip obtained from a steel melt of the following composition (in wt. %): Si: </= 1.8 %, Al: < 1 %, C: </= 0.0200 %, Mn < 0.5 %, Sn: </= 0.03 %, Sb: </= 0.1 %, P: </= 0.1 %, S: < 0.02 %, Ti: </= 0.0100 %, N: </= 0.0100 %, O: </= 0.0100 %, B: </= 0.0100 % and, as the remainder, iron and unavoidable impurities, whereby the electric sheet steel or strip, over the course of a cooling starting from a temperature of at least 1150 DEG C, firstly has an austenitic structure and then a mixed structure consisting of austenite and ferrite, and finally it has a ferritic structure after reaching a temperature less then 1050 DEG C. The electric sheet steel or strip has, at a polarization of 1.5 T and a frequency of 50 Hz, a hysteresis loss P1.5 that is less than 4.7 W/kg, at a magnetic field strength of 2500 A/m, a magnetic polarization B25 equal to at least 1.60 T and, at a frequency of 50 Hz, a magnetic permeability mu 1.5 of at least 1500. The electric sheet steel or strip constituted in such a manner has, at the same time, low hysteresis losses and a good saturation magnetization, which is expressed in a higher permeability mu , and can be easily produced.

IPC 1-7

C21D 8/12; H01F 1/147

IPC 8 full level

C21D 8/12 (2006.01); H01F 1/147 (2006.01)

CPC (source: EP)

C21D 8/1222 (2013.01); H01F 1/14775 (2013.01)

Citation (search report)

See references of WO 03014404A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

DOCDB simple family (publication)

WO 03014404 A1 20030220; EP 1415008 A1 20040506

DOCDB simple family (application)

EP 0208979 W 20020810; EP 02754991 A 20020810