IF钢镀锌板表面夹杂物缺陷分析与控制  

Analysis and control of surface defects on IF steel for galvanized steel sheet

作　　者：黄俊[1] 许东利[1] 王莉[1] 陈玉鑫[1] 曾立[1] 

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《炼钢》2014年第2期26-29,共4页Steelmaking

摘　　要：分析了首钢京唐钢铁联合有限责任公司IF钢镀锌板表面夹杂物缺陷及IF钢连铸工艺。结果表明,开浇第2块连铸坯、换水口前后连铸坯和连浇过渡坯夹杂物缺陷概率高是造成IF钢镀锌板表面夹杂物缺陷的主要原因。采取高频快涨的连铸机拉速控制、留钢操作、提高耐火材料质量、规范换水口前后化渣操作、钢包水口浸入式开浇、RH化冷钢与洗槽、优化中间包结构以及连铸坯火焰清理等措施后,IF钢镀锌板表面夹杂物缺陷显著降低,因表面夹杂物缺陷导致的产品不合格率由7.87%降至2.59%。The surface defects and continuous casting process of IF steel for galvanized steel sheet of SGJT were analyzed. The results showed that the main reasons of the sur- face defects were the higher possibility of inclusions contents in the second slabs, nozzle- changed slabs and middle slabs. The surface defects were decreased remarkably through several measures such as steel-remaining, refractory quality improving, cold steel remo- ving in RH and tundish structure opitimizing. The product fraction defective caused by surface inclusions defects decreased to 2.59 % from 7. 87 %.

关 键 词：冷轧镀锌板 夹杂缺陷 分析 控制 

分 类 号：TF762[冶金工程—钢铁冶金]