| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a rupture during rolling or a damage on the surface of a plate and on a rolling roll, moreover, to obtain the high yield of a product. SOLUTION: In a continuous hot rolling method to be performed after joining preceding slab 1 and succeeding slab 2, the following conditions must be satisfied. (A) The fitting surface 3 of the preceding slab 1 and the succeeding slab 2 is parallel with the normal direction of the rolling surface of the slab. (B) When expressing the length of the fitting part of the preceding slab 1 and the succeeding slab 2 by Lt, and the width of both slabs 1, 2 by Lo, Lt/Lo>=2.5. (C) Before the hot rolling, the fitting part is joined by flash welding over the range of 0.025×Lo or over respectively from both tip parts of the slab.
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