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新日铁八幡厂第三炼钢车间用弧形连铸机生产含Si＞3％、厚度250mm的板坯，为了提高生产率和减少加热炉燃料单耗，把拉速从1．2m／min提高到1．6m／min。但是在铸坯内部和中心产生裂纹，于是采取了防止裂纹产生的一系列措施：①当拉速达到1．6m／msn时，加强二次冷却强度，使喷
Nippon Steel Yawata Plant No.3 Steelmaking Plant Produces Slab with Si> 3% and Thickness of 250mm by Increasing the Drawing Speed from 1.2m / min to Increase Productivity and Furnace Fuel Consumption To 1.6m / min. But in the slab and the center of the cracks, so take a series of measures to prevent cracks: ① When the speed reached 1.6m / msn, to strengthen the secondary cooling strength, so that the spray