SPHC热轧卷表面翘皮缺陷的控制  

Control of surface sliver defect in hot-rolled SPHC strip

作　　者：苏笃星 马建超[1] 周彦召 王建华[2] 

机构地区：[1]江苏沙钢集团有限公司江苏省沙钢钢铁研究院,江苏张家港215625 [2]江苏沙钢集团有限公司宏发炼钢厂,江苏张家港215625

出　　处：《炼钢》2014年第2期18-21,25,共5页Steelmaking

摘　　要：对SPHC热轧卷表面翘皮缺陷形貌、分布规律及相应成分进行了分析。结果表明,结晶器保护渣卷入是引起SPHC热轧卷表面翘皮缺陷的主要根源。通过改进生产工艺,减少Al2O3夹杂含量,提高钢水可浇性,结合对塞棒氩气流量和保护渣黏度的调整,结晶器器液面波动控制在±3 mm以内,减少了结晶器卷渣,使因翘皮缺陷引起的产品改判率由15%降低至7%以下。Morphology, distribution and chemical composition of surface sliver defect in hot-rolled SPHC strip were investigated. The result shows that mold powder entrap- ment during continuous casting process is the key reason for the surface sliver defect. After the adjustment of steelmaking process, alumina inclusion was decreased, and the pourability of the molten steel was improved. In addition, with the modification of stop- per argon flow rate and the viscosity of mould flux, mould level fluctuation was con- trolled in the range of ＋ 3 ram, and the degrade ratio of the strip due to silver defects reduced from 15%0 to 7 %.

关 键 词：SPHC钢 翘皮缺陷 结晶器液面波动 

分 类 号：TF761.2[冶金工程—钢铁冶金]