PROBLEM TO BE SOLVED: To provide a restraining method to a surface crack, such as traverse crack, of a continuously cast slab. ;SOLUTION: At the time of producing the steel cast slab satisfying formulas I and II by using a curving type or a vertical bending type continuous caster, a necessary time of drawing-out from a meniscus part of molten steel in a mold to the lower end of the mold is made within 1min and the secondary cooling is executed immediately after drawing and the surface temp. is cooled to the A3 transformation temp. or lower within 1min. Cp=C(%)+Mn(%)/33+Ni(%)/25+Cu(%)/44+N(%)/1.7.... (I). Cp0.18... (II). Wherein, Cp is the carbon equivalent and (%) is the mass%. The heat on the cast slab is recovered after cooling to the A3 transformation temp. or lower according to these formulas, and the surface temp. on the cast slab at the bending point and the straightening point is made to ≥850°C and the straightening can be finished within 20min after passing through a meniscus of the molten steel in the mold.;COPYRIGHT: (C)1997,JPO
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机译：解决的问题：提供一种抑制连续铸造板坯表面裂纹（例如横向裂纹）的方法。 ;解决方案：使用弯曲型或垂直弯曲型连铸机生产满足式I和II的钢坯时，从模具中的钢水弯月形部分抽出到下部的必要时间在1分钟内完成模具的末端，并在拉伸和表面温度后立即进行二次冷却。冷却到A 3 转变温度。或在1分钟内降低。 C p = C（％）+ Mn（％）/ 33 + Ni（％）/ 25 + Cu（％）/ 44 + N（％）/ 1.7 ....（I）。 C p <0.18 ...（II）。其中，C p 为碳当量，（％）为质量％。冷却至A 3 转变温度后，铸坯上的热量得以恢复。根据这些公式，以及表面温度。在铸坯上的弯曲点和矫直点达到≥850°C，并在通过结晶器中钢水的弯月面后20min内完成矫直。;版权：（C）1997，JPO
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