Nichtorientiertes Elektrostahlblech und Herstellungsverfahren dafür
Anmelder: Hyundai Steel Company 🇰🇷
Details
- Veröffentlichungs-Nr.
- EP4752239
- Anmeldetag
- 17. Juli 2024
- Veröffentlichung
- 30. Januar 2025
- Rechtsraum
- EP
Abstract
A method for manufacturing a non-oriented electrical steel sheet, according to one embodiment of the present invention, includes the steps of: (a) preparing steel that is a half-finished product including 2.5-2.8 wt% of silicon (Si), 1.45 wt% or more of nickel (Ni), 0.05 wt% or less of aluminum (Al), and the balance of iron (Fe) and other inevitable impurities; (b) hot rolling the sheet, thereby forming a hot-rolled steel sheet; (c) cold rolling the hot-rolled steel sheet, thereby forming a cold-rolled steel sheet; and (d) cold roll annealing the cold-rolled steel sheet, in which step (d) includes the steps of: (d-1) increasing the temperature from room temperature to a first temperature at which austenite phase is stable, and then maintaining same for a first set time; (d-2) lowering the temperature to a second temperature at which a two-phase region where austenite phase and ferrite phase coexist is stable, and then maintaining same for a second set time; and (d-3) lowering the temperature to room temperature, and the phase transformation heat treatment in the cold roll annealing step can improve the texture such that an orientation favorable to magnetism is developed, and can enhance magnetic properties.
Anmelder
- Firma
- Hyundai Steel Company
- Land
- 🇰🇷 Südkorea
Hyundai Steel ist ein südkoreanischer Stahlhersteller innerhalb der Hyundai Motor Group. Das Patentportfolio konzentriert sich stark auf Metallurgie und Oberflächentechnik, ergänzt durch Werkzeug- und Fertigungstechnik. Die Titel betreffen unter anderem nicht kornorientierte Elektrobleche und beschichtete Stahlbleche.
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