低碳钢板坯表面夹渣的研究与控制  

Research and control of surface inclusion in low-carbon steel slab

作　　者：孙云虎[1] 罗传清[1] 王延峰[1] 张华[2] 

机构地区：[1]武汉钢铁股份有限公司炼钢总厂,湖北武汉430083 [2]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《炼钢》2013年第5期30-33,共4页Steelmaking

摘　　要：针对武钢板坯边部表面(皮下)夹渣引起钢卷边部黑线和起皮等边部缺陷的问题,提出了使用高黏度保护渣、侧孔扩张型浸入式水口和恒速浇铸等控制措施,并进行了工业试验。试验结果表明:采用高黏度保护渣浇铸,尤其是黏度0.30 Pa·s以上的保护渣,可以有效减少结晶器卷渣的发生;使用侧孔扩张型浸入式水口和恒速浇铸,可以有效减小结晶器液面波动,降低铸坯的表面夹渣发生率;工艺优化后,低碳钢板坯因表面(皮下)夹渣的转用率由4.28%降到0.16%。Slab edge surface inclusion caused the steel coil＇s edge defects of black line and peeling in WISCO. High viscosity mold powder, SEN with expansive side port and constant speed casting were applied in industrial experiment. The experimental results show that casting with high-viscosity fluxes can effectively decrease the occurrence of mold slag entrapment, especially above 0.30 Pa. s. And casting by SEN with expansive side port and constant speed can effectively reduce the mold level fluctuation, and decrease incidence of surface inclusion. After process optimized, the amendment rate of the low-carbon steel slab for surface inclusion was dropped from 4. 28 % to 0. 16 %.

关 键 词：表面夹渣 高黏度保护渣 侧孔扩张型浸入式水口 恒速浇铸 

分 类 号：TF777.1[冶金工程—钢铁冶金]