张迎春, 成国光, 钱国余, 等. 改善2Cr13马氏体不锈钢150 mm x 150 mm连铸坯表面质量的工艺实践[J]. 特殊钢, 2014,35(6):38-40.
张迎春, 成国光, 钱国余, et al. Process Practice of Improvement on Surface Quality of 150 mm x 150 mm Casting Billet of Martensite Stainless Steel 2Cr13[J]. Special Steel, 2014, 35(6): 38-40.
张迎春, 成国光, 钱国余, 等. 改善2Cr13马氏体不锈钢150 mm x 150 mm连铸坯表面质量的工艺实践[J]. 特殊钢, 2014,35(6):38-40.DOI:
张迎春, 成国光, 钱国余, et al. Process Practice of Improvement on Surface Quality of 150 mm x 150 mm Casting Billet of Martensite Stainless Steel 2Cr13[J]. Special Steel, 2014, 35(6): 38-40.DOI:
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。
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.