| 摘要 |
PROBLEM TO BE SOLVED: To perform buildup welding efficiently, reduce the amount of buildup welded metal remaining on a steel plate after rolling, and reduce trimming margin by specifying the dimensions of a buildup welded metallic layer on the slab side which is provided to prevent edge cracking when a stainless steel is hot-rolled. SOLUTION: Stainless steel slab 1 is provided on its side face C with a welded metallic layer 2. Y is distance (mm) between the buildup welded metallic layer 2 and a ridgeline 3 at which the side face C intersects with a top surface A or a bottom surface B of the slab 1, and Ym is maximum allowable value (mm) of Y, and the distance Y is to satisfy Ym/5<=Y<=Ym. In the case of W/H>=3.2, however, Ym=0.8 H2/W is satisfied, and in the case of W/H<3.2, Ym=0.25 H is satisfied. W is slab width (mm) and H slab thickness (mm). This method is effectively applied for stainless steel difficult to be hot-rolled; e.g. stainless steel containing lots of B, S, Mo, N, or the like. The thickness of the buildup welded metallic layer 2 is 2 mm or more.
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