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US 12,590,358 B2Granted
Non-oriented electrical steel sheet and manufacturing method therefor
AssigneePosco
InventorSeil Lee
Life of this patent
Estimating the term…
Abstract
A non-oriented electrical steel sheet according to an embodiment of the present invention includes: Si at 1.5 to 4.0 wt %, Al at 0.001 to 0.011 wt %, Mn at 0.05 to 0.40 wt %, S at 0.0001 to 0.01 wt %, As at 0.003 to 0.015 wt %, Mg at 0.0007 to 0.003 wt %, and the balance including Fe and other impurities unavoidably added thereto.
Claims9
A non-oriented electrical steel sheet, comprising:
- Si at 1.5 to 4.0 wt %, Al at 0.001 to 0.011 wt %, Mn at 0.05 to 0.40 wt %, S at 0.0001 to 0.01 wt %, As at 0.0034 to 0.01 wt %, Mg at 0.0009 to 0.002 wt %, and the balance including Fe and other impurities unavoidably added thereto,
- wherein the non-oriented electrical steel sheet satisfies Formulas 1 and 2:
- [As]>[Al], and Formula 1
- 3×[Mg]>[Al], Formula 2
- wherein [As], [Mg] and [Al] are contents (wt %) of As, Mg and Al, respectively,
- wherein an average particle diameter of the precipitate of As is 3 to 100 nm,
- wherein an average particle diameter of the precipitate of MgS is 3 to 30 nm,
- wherein iron loss (W15/50) of the non-oriented electrical steel sheet is 1.5 to 2.15 W/kg, and
- wherein iron loss (W13/50) of the non-oriented electrical steel sheet is 1.3 to 1.47 W/kg.
6 more elements
Dependencies are inferred from the claim text.