Warmgewalztes Geglühtes Blech für Nichtorientiertes Elektromagnetisches Stahlblech, Verfahren zur Herstellung davon und Verfahren zur Herstellung eines Nichtorientierten Elektromagnetischen Stahlblechs

Details

Veröffentlichungs-Nr.

EP4752248

Anmeldetag

24. Mai 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

IPC

C22C38/00, C21D8/12, C22C38/60

Abstract

Provided is such a hot-rolled annealed sheet for a non-oriented electrical steel sheet that this hot-rolled annealed sheet is capable of realizing both sheet fracture prevention during cold rolling and excellent magnetic properties after performing cold-rolled sheet annealing. This is because this hot-rolled annealed sheet is configured in a manner such that an average crystal grain size on a cross-sectional surface thereof in a rolling direction after pickling is 40 to 250 µm, and that an integrated intensity of an Fe-Al-based oxide on a steel sheet surface layer is 200 cps·deg or lower when measured by X-ray diffraction. Such configuration is either achieved by obtaining a hot-rolled annealed sheet after heating and hot rolling, under given conditions, a steel slab containing given amounts of C, Si, Mn, P, S, Al, N, O, Sn, and Sb, and then by performing shot blasting and then pickling on the sheet; or is achieved by obtaining a hot-rolled annealed sheet after heating and hot rolling, under given conditions, the above steel slab, and then by performing brush grinding and then pickling on the sheet. Further, a non-oriented electrical steel sheet can be manufactured using the above hot-rolled annealed sheet.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan