METHOD OF PRODUCING HOT-ROLLED STEEL SHEET FOR NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD OF PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET, AND HOT-ROLLED STEEL SHEET FOR NON-ORIENTED ELECTRICAL STEEL SHEET
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Jan 24, 2023
filing date -
Jan 24, 2023
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Abstract
Ridging caused when handling steel containing a large amount of alloying elements such as Si and Al in a low-speed hot rolling process is suppressed. A method of producing a hot-rolled steel sheet for a non-oriented electrical steel sheet comprises: producing a steel slab having a certain chemical composition and a thickness of 50 mm to 200 mm by continuous casting; conveying the steel slab to a hot rolling line while maintaining a surface temperature of the steel slab at 800° C. or more; and performing hot rolling in which the steel slab is sequentially subjected to rough rolling, reheating treatment, and finish rolling in the hot rolling line to obtain a hot-rolled steel sheet, wherein the hot rolling is performed under specific conditions.
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