特殊钢大方坯连铸机设计特点及生产实践  

Design characteristics and production practice of bloom caster for special steel

作　　者：李浩 李新[1] 陶承岗[1] 汪国才[1] LI Hao;LI Xin;TAO Cheng-gang;WANG Guo-cai(Special Steel Company,Ma’anshan Iron and Steel Co.,Ltd.,Ma’anshan 243000,Anhui,China)

机构地区：[1]马鞍山钢铁股份有限公司特钢公司,安徽马鞍山243000

出　　处：《连铸》2023年第2期99-105,共7页Continuous Casting

摘　　要：论述了某厂特殊钢大方坯连铸机的核心工艺及关键设备,阐述了控制铸坯质量的关键设备技术要点及工艺实践,着重描述了大方坯轻、重压下工艺对改善大方坯内部质量的重要作用,详细介绍了该连铸机生产典型高碳轴承钢的冶金效果。生产实践表明,保持生产拉速恒定的情况下,确定合理的轻、重压下区间及压下工艺参数,可显著降低高碳钢中心偏析、改善中心疏松、消除中心缩孔。大方坯连铸机生产的典型钢种GCr15,恒拉速浇注,铸坯碳偏析指数为0.97~1.06,中心疏松不大于1.0级的比例为100%,无中心缩孔缺陷。The core process and key equipment of special steel bloom caster in a plant was discussed,the key equipment,technical points and process practice of controlling slab quality were expounded,emphatically described the important role of light and heavy reduction process in improving the internal quality of bloom,and introduced in detail the metallurgical effect of the caster in producing typical high carbon steel.The production practice shown that the central segregation of bearing steel can be significantly reduced,the central porosity can be improved and the central shrinkage can be eliminated by determining the reasonable soft and hard reduction interval and reduction process parameters under the condition of keeping the production drawing speed constant.The typical steel GCr15 produced by bloom caster was poured at a constant casting speed,the carbon segregation index of billet was between 0.97-1.06,the proportion of central porosity not greater than 1.0 is 100%,and there was no central shrinkage defect.

关 键 词：轴承钢 轻压下 重压下 中心偏析 中心缩松 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]