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发明公开
CN103215496A 一种含硼包晶钢的生产方法 无效 - 撤回

一种含硼包晶钢的生产方法
摘要：
本发明涉及一种含硼包晶钢的生产方法，其特征是：转炉终点钢水的碳含量、磷含量及出钢温度为：碳含量C≥0.05wt%，P≤0.025wt%，出钢温度1610～1645℃；连铸过热度控制在30±5℃，拉速控制在2.2～2.4m/min范围以内，结晶器水流量减少到140m3/h，采用熔点较低的保护渣，喷淋水表采用弱冷水表，拉速2.2m/min时，二次冷却区第一段水量6.09L/min，第二段水量3.00L/min，第三段水量0.62L/min，拉速2.4m/min时，二次冷却区第一段水量7.25L/min，第二段水量3.34L/min，第三段水量1.24L/min。其优点是：在不改变工艺路线的前提下，避免了SWRCH18KB含硼包晶钢角部热裂纹的产生。
摘要（英）：

The invention relates to a method for preparing boron-containing peritectic steel. The method is characterized in that the end-point molten steel of a converter has the carbon content of not less than 0.05wt%, the phosphorus content of not more than 0.025wt% of P and the tapping temperature of 1610-1645 DEG C; the continuous casting superheat degree is controlled at 30 +/-5 DEG C; the pulling speed is controlled within the range from 2.2 to 2.4 m/min; the water flow of a crystallizer is reduced to 140m<3>/h; the casting powder with low melting point is adopted; a cold water meter is adopted as a spraying water meter; when the pulling speed is 2.2 m/min, a first section of water volume in a secondary cooling zone is 6.09 L/min, a second section of water volume is 3.00 L/min, a third section of water volume is 0.62 L/min; and when the pulling speed is 2.4 m/min, the first section of water volume in the secondary cooling zone is 7.25 L/min, the second section of water volume is 3.34 L/min, a third section of water volume is 1.24 L/min. The method has the advantage that occurrence of hot cracks at the corner of SWRCH18KB boron-containing peritectic steel is avoided on the premise of keeping a process route.

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