| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively prevent a cast slab fro being segregated by striking a blow effectively from the cast slab surface to the cast slab including a non-solidified portion even in the large-width cast slab. <P>SOLUTION: In this continuous casting method, in the case of casting the cast slab 1 having a rectangular cross section, the range of at least 0.1-0.9 center solid-phase ratio fs at the thickness center part of the cast slab 1 is continuously subjected to light rolling-reduction so that the rolling-reduction ratio per 1 m of thickness direction in the cast slab 1 becomes within 1% and also, at least at one position in the range of 0.1-0.9 center solid-phase ratio fs, both sides of short wall surfaces facing each other in the cast slab 1 are continuously blowed in the width direction of the cast slab. The blow is performed with 4-12 Hz blow vibration frequency and 30-150 J vibration energy. In this way, even in the large-width cast slab, the occurrence of center segregation or V segregation is effectively prevented, thereby obtaining the cast slab excellent in internal quality. <P>COPYRIGHT: (C)2007,JPO&INPIT |
