Back to results
US 2025/0051888 A1Published application
Non-oriented electrical steel sheet and method for manufacturing same
AssigneePosco
InventorsJaewan Hong, Hyung Don Joo, Junesoo Park
Life of this patent
Estimating the term…
Abstract
A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt %, 1.4-3.0% of Si; 0.001-1.5% of Mn; and 0.001-0.2% of Al, with the remainder of Fe and inevitable impurities, wherein a thickness deviation in the direction perpendicular to a rolling direction is 1.5 μm or less per 5 mm length, and a thickness derivation in the rolling direction is 10 μm or less per 1000 m length.
Claims16
A non-oriented electrical steel sheet comprising:
- by wt %, Si:
- 1.4 to 3%, Mn:
- 0.001 to 1.5%, and Al:
- 0.001 to 0.2%, with the remainder of Fe and inevitable impurities,
- wherein a thickness deviation that is generated in a direction perpendicular to a rolling direction is 1.5 μm or less per length of 5 mm, and a thickness deviation that is generated in the rolling direction is 10 μm or less per length of 1000 m.
2 more elements
A method for manufacturing a non-oriented electrical steel sheet, the method comprising:
- manufacturing a hot rolled plate by hot-rolling a slab including, by wt %, Si:
- 1.4 to 3.0%, Mn:
- 0.001 to 1.5%, and Al:
- 0.001 to 0.2%, with the remainder of Fe and inevitable impurities;
- acid-pickling the hot rolled plate two to four times;
- and
- manufacturing a cold rolled plate by cold-rolling the acid-pickled hot rolled plate,
- wherein the manufacturing of a hot rolled plate includes rough rolling of the slab and finish rolling, and
- the finish rolling performs rolling through passes of a plurality of times and a reduction ratio of a final pass of the passes of a plurality of times is 17% or less.
6 more elements
Dependencies are inferred from the claim text.