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 %.
出处
《炼钢》
CAS
北大核心
2014年第2期26-29,共4页
Steelmaking
关键词
冷轧镀锌板
夹杂缺陷
分析
控制
cold rolled galvanizing sheet
surface inclusions
analysis
control
