CSP工艺生产SK2高碳工具钢研究及实践

Research and practice of producing SK2 high carbon tool steel by CSP process

从SK2高级高碳工具钢的特性出发,分析了转炉、精炼控制钢水洁净度的生产工艺,研究了连铸保护渣、拉速、比水量的优化方向。设计了转炉终点高碳低磷、精炼过程控氧控氮的工艺,开发了低碱度、低熔点、润滑性良好的连铸保护渣及二冷比水量1.6~1.7 L/(kg·min)、拉速3.5~4.0 m/min的连铸工艺,成功在薄板坯连铸连轧生产线开发了SK2钢的生产工艺。

Based on the characteristics of SK2 advanced high carbon tool steel,the production process of converter and refining to control the cleanliness of molten steel was analyzed,and the optimization direction of continuous casting mold flux,casting speed and specific water volume was studied.The process of high carbon and low phosphorus at the end of converter and oxygen and nitrogen control in refining process was designed.The continuous casting protective slag with low basicity,low melting point and good lubricity and the continuous casting process with secondary cooling specific water volume of 1.6-1.7 L/(kg·min)and drawing speed of 3.5-4.0 m/min were developed.The steelmaking process for producing SK2 steel was successfully developed in the thin slab continuous casting and rolling production line.