宣钢45号圆钢质量的控制研究

Study on Quality Control of Xuanhua Steel No. 45 Steel

针对宣钢生产的45号含铝圆钢,特别是Φ55 mm、Φ70 mm圆钢的表面裂纹突出的问题,采用跟踪实验、系统取样、综合分析等多种技术手段,对现行生产的45号圆钢的质量原因从宏观形态、铸坯缺陷、洁净度等进行了分析。根据上述试验研究结果,通过采取改善出钢挡渣、加强钢水脱氧,改善连铸保护浇注等措施,使宣钢45号圆钢的表面裂纹现象得到明显改善。

Aiming at NO. 45 aluminum steel produced form Xuan Steel, especially the surface crack with the diameter of55 mm, 70 mm round steel, by various techniques of tracking experiment, systematic sampling and comprehensive analysis,from the macro morphology, casting defects, cleanliness, this paper analyzes quality reasons of currently produced No. 45 round steel. According to the experimental results, by improving steel slag blocking and strengthening deoxidation of molten steel, improving the protective casting and other measures, the surface cracks of Xuan Steel No. 45 round steel are obviously improved.