DIRECT-FEED ROLLING METHOD OF CONTINUOUSLY CAST SLAB

摘要

PROBLEM TO BE SOLVED: To produce a steel plate excellent in the surface characteristic by preventing defect caused by scale when the steel plate is produced by directly feeding and rolling a continuously cast slab. SOLUTION: In the direct-feed rolling method of the continuously cast slab producing the steel plate with the direct-feed rolling from the cast slab produced with a continuous caster, the surface roughness at the center part in the width direction of a long side surfaces of the cast slab produced with the continuous caster, is made to <=0.2 mm. At this time, it is desirable to use a deviated sinusoidal waveform to mold oscillation in the continuous caster and to apply the rolling reduction to the cast slab during casting with cast slab supporting rolls in the continuous caster.