| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to prevent the breakout of vertical cracks in high velocity casting of a thin casting piece of mid-to-low carbon steel or the like, by a vertically bending type continuous casting machine. SOLUTION: When casting with this vertically bending equipment, which uses guide roll 3 under the outlet of a mold 1 vertical part 6 is to sustain the short length of a cast piece, L/H is set at 0.5∼0.9, where H is the length of the lower vertical part of the outlet side of the mold, and L is 0.5-2.0 m, the length from the last guide roller of the vertical part supporting the shorter side 2 of the casting piece 5 to the lower end of the vertical part. The amount of the secondary cooling water per unit area of the shorter side in the vertical region is set at 20N litters per square meters or less.
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