Abstract: The flow sheet for production of 150 mm x 150 mm casting billet of stainless steel 2Cr13 (/% ： 0. 16 ~ 0.25C, ≤1.0Si, ≤1.0Mn, ≤0.035P, ≤0,030S, 12. 0 - 14. 0Cr) is hot metal pretreatment-50 t AOD-LF-CCM, slow cooling, annealing and grinding. Commercial pilot production results show that with the technology measures including using mold powder with viscosity (0. 58 ±0. 1) Pa • s, basicity 0. 95 ± 0. 01, and melting point fluctuating extent 5 ℃ , casting speed decreasing from 1. 3 m/min to 1. 1 m/min, mold oscillation amplitude increasing from 3 mm to 5 mm, oscillation frequency decreasing from 139 times/min to 137 times/min and liquid superheating extent decreasing from 35 °C to 20 - 30 °C,the surface longitudinal depression and crack are eliminated and the yield of billet is up to 94. 07% , the low-cooled billets can direct-roll to save both procedure of billet annealing and grinding and decrease the production cost.

摘要： 2Cr13不锈钢（/%:0.160.25C,≤1.0Si,≤1.0Mn,≤0.035P,≤0.030S,12.0~14.0Cr）150 mm×150 mm铸坯生产流程为铁水预处理-50 t AOD-LF-CCM,缓冷,退火,修磨。工业性试生产结果表明,通过采用粘度（0.58±0.1）Pa·s,碱度0.95±0.01,熔点波动范围5℃的结晶器保护渣,拉速从1.3 m/min降至1.1 m/min,振幅从3 mm提高到5 mm,振动频率从139次/min减到137次/min,钢水过热度从35℃降至20~30℃,铸坯收得率达94.07%,消除了铸坯纵向凹陷和裂纹,铸坯缓冷后可直接轧制,可省去铸坯退火、修磨两道工序,降低了生产成本。

关键词: 2Cr13马氏体不锈钢 , 铁水预处理-50 t AOD-LF-CCM , 150 mm x 150 mm连铸坯 , 表面质量