Patent ID: 7846271

Claim:
A method for manufacturing a non-oriented electrical steel sheet that has excellent magnetic properties while hot-rolled sheet annealing can be omitted, the method comprising the steps of: reheating a slab comprising 0.005 wt % or less of C, 1.0-3.0 wt % of Si, 0.1-2.0 wt % of Mn, 0.1 wt % or less of P, 0.1-1.5 wt % of Al, wherein the elements Mn and Al satisfy an equation of −0.2<Mn−Al<1.0 and a remainder of Fe and other inevitable impurities, to a temperature ranging from Ar1 to 1250° C.; hot-rolling the reheated slab in such a manner that 70% or more of a total hot finish rolling is performed in a two-phase region of austenite+ferrite, and the remaining reduction ratio is performed in a ferrite single-phase region, in which the reduction ratio in a final pass becomes {20−(960−finish rolling end temperature)/20}% or less; winding the hot-rolled steel sheet at a temperature of 650-800° C.; cold-rolling the wound steel sheet to a predetermined thickness; and subjecting the cold-rolled steel sheet to final annealing.