| 摘要 |
PROBLEM TO BE SOLVED: To provide a slab continuous casting method which enables a reduction in porosity remain and yield a well-shaped slab.SOLUTION: A slab continuous casting method for pressing down a part with a center solidus rate of 0.8 or more out of a slab 11 by means of a press-down roll group where a plurality of pairs of press-down rolls 30 are arranged in a casting direction. Two or more pairs of press-down rolls 30 sequentially adjacent of the press-down roll group are split into a plurality of split rolls 31 in a width direction of the slab 11, and the width W (mm) of a non-contact part 30a satisfies 100≤W≤Ws/2n. In the two or more pairs of sequentially adjacent press-down rolls 30, the pairs of press-down rolls are disposed with positions of non-contact parts 30a coincident, and the press-down rolls 30 sequentially adjacent in the casting direction are disposed with the positions of non-contact parts 30a different, where Ws is a slab full width, and n is a split number of the press-down rolls. |
