简述了攀钢自主开发的360 mm×450 mm大方坯连铸集成技术及其效果.通过研究开发合理的连铸二冷技术、凝固末端动态轻压下技术和结晶器电磁搅拌技术,提高了铸坯内部质量,解决了大方坯中心疏松、中心偏析、内部裂纹等内部缺陷较严重的技术难题;通过研究设计合理的结晶器结构和冷却工艺制度,以及开发性能优良的连铸保护渣,提高了铸坯表面质量,减轻了大方坯表面凹槽和凹坑缺陷.两年多的生产实践表明,攀钢360 mm×450 mm大方坯连铸机生产的铸坯,中心疏松、偏析、缩孔、裂纹等内部缺陷的评判级别均小于1.0级的综合比例达到99.03%,中心碳偏析指数为1.01～1.05(平均1.03),铸坯表面无缺陷率平均达到99.54%.研究成果为促进攀钢品种结构调整和开发高质量、高性能、高附加值产品提供了重要的技术支撑.
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