NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR
First Claim
1. A non-oriented electrical steel sheet, comprisingSi:
- 2.5-3.5%, Al;
0.3-1.5%, Mn;
0.3-1.5%, N;
0.001-0.005%, and S;
0.001-0.005% in weight %, one or two of b;
0.02-0.25% and Sn;
0.02-0.25%, Fe in a balance amount, and other inevitable impurities,wherein contents of the Al, Mn, Sb, and Sn satisfy Equations 1 to 3;
0.9<
([Al]+[Mn])<
1.5
[Equation 1]
0.05<
([Sb]+[Sn])<
0.25
[Equation 2]
0.04<
([Sb]+[Sn])/([Al]+[Mn])<
0.17
[Equation 3]wherein, in Equations 1 to 3, [Al], [Mn], [Sb], and [Sn] refer to weight percent (%) of each Al, Mn, Sb, and Sn.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of manufacturing a non-oriented electrical steel sheet is disclosed. A method of manufacturing a non-oriented electrical steel sheet according to the present invention includes reheating slab consisting of Si: 2.0-4.0%, acid-soluble Al: 0.01-0.04%, Mn: 0.20% or less, Sb: 0.005-0.10%, N: 0.005% or less, S:0.005% or less, C: 0.005-0.015%, Fe in a balance amount, and other inevitable impurities in weight percent (wt %); hot rolling the slab to prepare a hot rolled steel sheet; cold rolling the hot rolled steel sheet to prepare a cold rolled steel sheet; primarily recrystallization-annealing the cold rolled steel sheet; and high-temperature annealing the cold rolled steel sheet subjected to the primarily recrystallization-annealing.
1 Citation
11 Claims
-
1. A non-oriented electrical steel sheet, comprising
Si: - 2.5-3.5%, Al;
0.3-1.5%, Mn;
0.3-1.5%, N;
0.001-0.005%, and S;
0.001-0.005% in weight %, one or two of b;
0.02-0.25% and Sn;
0.02-0.25%, Fe in a balance amount, and other inevitable impurities,wherein contents of the Al, Mn, Sb, and Sn satisfy Equations 1 to 3;
0.9<
([Al]+[Mn])<
1.5
[Equation 1]
0.05<
([Sb]+[Sn])<
0.25
[Equation 2]
0.04<
([Sb]+[Sn])/([Al]+[Mn])<
0.17
[Equation 3]wherein, in Equations 1 to 3, [Al], [Mn], [Sb], and [Sn] refer to weight percent (%) of each Al, Mn, Sb, and Sn. - View Dependent Claims (2, 3, 4, 5)
- 2.5-3.5%, Al;
-
6. A method of manufacturing a non-oriented electrical steel sheet, comprising
preparing a slab including Si: - 2.5-3.5%, Al;
0.3-1.5%, Mn;
0.3-1.5%, N;
0.001-0.005%, and S;
0.001-0.005% in weight %, one or two of Sb;
0.02-0.25% and Sn;
0.02-0.25%, Fe in a balance amount, and other inevitable impurities, wherein contents of the Al, Mn, Sb, and Sn satisfy Equations 1 to 3;reheating the slab and hot rolling the same to prepare a hot rolled steel sheet; cold-rolling the hot rolled steel sheet to prepare a cold rolled steel sheet; and finish-annealing the cold rolled steel sheet;
0.9<
([Al]+[Mn])<
1.5
[Equation 1]
0.05<
([Sb]+[Sn])<
0.25
[Equation 2]
0.04<
([Sb]+[Sn])/([Al]+[Mn])<
0.17
[Equation 3]wherein, in Equations 1 to 3, [Al], [Mn], [Sb], and [Sn] refer to weight percent (%) of each Al, Mn, Sb, and Sn. - View Dependent Claims (7, 8, 9, 10, 11)
- 2.5-3.5%, Al;
Specification