低碳钢连铸板坯角部横裂的控制  

CONTROL OF CORNER CRACK OF LOW CARBON STEEL CONTINUOUS CASTING SLAB

作　　者：杨志刚 黄伟丽 王信威 陈四平 东根来 张立广 Yang Zhigang;Huang Weili;Wang Xinwei;Chen Siping;Dong Genlai;Zhang Liguang(Technical Center of Delong Iron and Steel Co.,Ltd.,Xingtai 054000,Hebei)

机构地区：[1]德龙钢铁有限公司技术中心,河北邢台054000

出　　处：《河北冶金》2022年第7期44-47,共4页Hebei Metallurgy

摘　　要：从连铸工艺和设备精度等方面分析了低碳钢Q235B铸坯表面角部横裂缺陷产生的原因,并进行了优化。通过实施二冷区主体弱冷的冷却策略及配水方案、优化铸机扇形段喷嘴布置方式以及严控钢种硫元素含量等措施,铸坯角部横裂缺陷率由10%降低至1.5%,提高了铸坯表面质量。From the aspects of continuous casting process and equipment precision,the cause of the transverse crack on the surface corner of low carbon steel Q235B billet was analyzed and optimized.By implementing the cooling strategy of weak cooling in the main body of the secondary cooling zone and water distribution scheme,optimizing the arrangement of nozzle in the sector of the casting machine and strictly controlling the sulfur content of steel,the defect rate of transverse crack in the corner of the casting slab was reduced from 10%to 1.5%,and the surface quality of the casting slab was improved.

关 键 词：Q235B 角部横裂 连铸 配水 喷嘴布置 

分 类 号：TF771.2[冶金工程—钢铁冶金]