Non-oriented electrical steel sheet and method for preparing same

A non-oriented electrical steel sheet comprising, by weight,

• Si:
• 2.0 to 3.5%,
• Al:
• 0.3 to 2.5%,
• Mn:
• 0.3 to 3.5%,
• Sn:
• 0.0030 to 0.2%,
• Sb:
• 0.0030 to 0.15%,
• P:
• 0.0040 to 0.18%,
• Ga:
• 0.0005 to 0.02%,
• Ge:
• 0.0005 to 0.02% such that a total amount of Ga and Ge is 0.001 to 0.03%, and
• a remainder including Fe and unavoidable impurities, and
• satisfying Equations 1 to 3 below:
• 0.05≤([Sn]+[Sb])/[P]≤25 [Equation 1]
• 0.2≤([Si]+[A1]+0.5×[Mn])/(([Ga]+[Ge])×1000)≤5.27 [Equation 2]
• 3.3≤([Si]+[A1]+0.5×[Mn])≤5.5 [Equation 3]
• where [Si], [Al], [Mn], [Ga], [Ge], [Sn], [Sb], and [P] respectively represent the content, % by weight, of Si, Al, Mn, Ga, Ge, Sn, Sb, and P,
• wherein the steel sheet has a texture satisfying a strength ratio of P200/(P211+P310) ≥0.5 as tested by XRD-testing an area of ½t to ¼t of a thickness of the steel sheet,
• where ½t refers to ½ of the thickness of the entire steel sheet,
• ¼t refers to ¼ of the thickness of the entire steel sheet,
• P200 refers to a strength of a diffraction peak obtained within 15 degrees of a 200 plane appearing in the XRD test,
• P211 refers to a strength of a diffraction peak obtained within 15 degrees of a 211 plane, and
• P310 refers to a peak of a diffraction strength obtained within 15 degrees of a 310 plane.