| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a steel sheet having reduced surface defects, by which the problem of surface flaws generated near the end part in the width direction of a hot rolled steel sheet is solved without providing particular equipment nor increasing special process load. SOLUTION: As for the shape of a short side 2 in the cross-sectional face of a slab, when the minimum value (α) of the crossed angle between a long side 1 and a straight line obtained by connecting a slab edge part 3 and a point on the short side is≤80°, the distance in a width direction from the slab edge part 3 to the center of the short side (the amount (d) of bulging in the short side) is controlled to be -3 to 5 mm, and in the case ofα>80°, the bulging amount (d) is controlled to be -3 to 10 mm. Further, the minimum valueαis monitored during continuous casting, and then the continuous casting conditions are controlled such that the bulging amount (d) is within the above range in accordance with the valueα. COPYRIGHT: (C)2008,JPO&INPIT
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