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US 12,215,403 B2Granted
Non-oriented electrical steel sheet and method for manufacturing same
AssigneePosco
InventorsHunju Lee, Jae-Hoon Kim, Seung-Gon Lee, Seung Il Kim
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Abstract
A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt %, Si: 1.5 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.05 to 1.5%, Sn: 0.015 to 0.1%, P: 0.005 to 0.05%, Ga: 0.001 to 0.004%, and Bi: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities. An area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.
Claims14
A non-oriented electrical steel sheet including, in wt %, C:
- 0.005 wt % or less, Si:
- 1.5 to 4.0%, Al:
- 0.1 to 1.5%, Mn:
- 0.05 to 1.5%, Sn:
- 0.015 to 0.1%, P:
- 0.005 to 0.05%, Ga:
- 0.001 to 0.004%, and Bi:
- 0.0005 to 0.003%, and the balance of Fe and inevitable impurities,
- wherein an area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.
6 more elements
A manufacturing method of a non-oriented electrical steel sheet, comprising:
- hot-rolling a slab including, in wt %, C:
- 0.005% or less, Si:
- 1.5 to 4.0%, Al:
- 0.1 to 1.5%, Mn:
- 0.05 to 1.5%, Sn:
- 0.015 to 0.1%, P:
- 0.005 to 0.05%, Ga:
- 0.001 to 0.004%, and Bi:
- 0.0005 to 0.003%, and the balance of Fe and inevitable impurities to manufacture a hot-rolled sheet;
- cold-rolling the hot-rolled sheet at a reduction ratio of 85% or more to manufacture a cold-rolled sheet;
- and
- final annealing the cold-rolled sheet,
- wherein after final annealing, an area fraction of texture in a {118}//ND orientation is higher than that of texture in a {111}//ND orientation.
10 more elements
Dependencies are inferred from the claim text.