| 摘要 |
PROBLEM TO BE SOLVED: To produce a thin casting piece having superior surface characteristics, in which surface cracks and surface flaws caused by a projection transcription are prevented, and in which development of cracks in the surface of a casting piece caused by rolling-in of scmm, in a continuous casting method of a thin casting piece. SOLUTION: A thin casting piece is continuously cast by using a cooling drum, in which dents having 200 to 300μm of a diameter and 80 to 200μm of depth at the peripheral surface of the drum are formed at 30 to 80% of a area rate and the surface of a projection portion is covered by a material in which its thermal conductivity is lower than that of the material used in a dented portion. The above-described material is only used in the projection portion of the surface of the cooling drum.
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