Abstract: 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.

Key words: high carbon tool steel, oxygen control, nitrogen control, protective slag, specific water volume, casting speed