Verfahren zum Kaltwalzen eines Kornorientierten Elektromagnetischen Stahlblechs, Verfahren zur Herstellung davon und Kaltwalzausrüstungsstrang

Details

Veröffentlichungs-Nr.

EP4818340

Anmeldetag

7. Januar 2025

Veröffentlichung

24. Juli 2025

Rechtsraum

EP

Abstract

Provided is a method capable of stably and productively producing a grain-oriented electrical steel sheet with excellent magnetic properties when performing cold rolling using a single-stand rolling mill. Specifically, provided is a cold rolling method for a grain-oriented electrical steel sheet, including, in forming a cold-rolled sheet with a final thickness by performing cold rolling with the total rolling reduction rate set to 80% or higher, dividing the cold rolling into first-stage cold rolling and second-stage cold rolling; performing, during the first-stage cold rolling, cold rolling using a tandem rolling mill to obtain an intermediate thickness; and performing, during the second-stage cold rolling, cold rolling through one to three passes using a single-stand rolling mill, with the ratio of the work roll diameter of the single-stand rolling mill to the work roll diameter of the final stand of the tandem rolling mill used in the first-stage cold rolling set in the range of 0.30 to 0.95, to obtain a final thickness following the intermediate thickness, thereby achieving the best value of the magnetic flux density B<8> of the resulting product sheet in the sheet width direction of 1.920 T or higher. Also provided are a method for producing a grain-oriented electrical steel sheet using the cold rolling method, and a cold rolling equipment line used for the cold rolling.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan