高强度含铌板坯表面横裂纹研究与控制  

Research and control of surface transverse crack of high strength slab containing niobium

作　　者：刘少伟 张胜伟[1] 韩绍根[1] 王向松[1] 刘帅[2] Liu Shaowei;Zhang Shengwei;Han Shaogen;Wang Xiangsong;Liu Shuai(No.2 Steel-Making and Rolling Plant,Anyang Iron and Steel Co.,Ltd,Anyang,455004,China;School of Metallurgy and Ecological Engineering,Beijing University of Science and Technology,Beijing 10083,China)

机构地区：[1]安阳钢铁股份有限公司第二炼轧厂,河南安阳455004 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《特钢技术》2022年第1期53-56,共4页Special Steel Technology

摘　　要：本文以AH60C含铌板坯为研究对象,结合生产现场实际情况,从钢种特性、二次冷却强度、结晶器保护渣性能三方面分析了铸坯表面横裂纹形成原因,采取控制钢中成分、降低二冷强度,提高矫直点温度、改善保护渣性能等措施,有效改善了铸坯表面横裂纹缺陷,使横裂纹发生率基本控制在0.5%以下,效果比较明显。Based on the AH60C niobium-containing slab as the research object, combined with the actual situation of production site, the causes of slab surface transverse crack are analyzed from three aspects such as steel grade characteristics, secondary cooling strength and mold powder performance. Measures such as controlling steel composition, reducing secondary cooling strength, increasing straightening point temperature and improving mold powder performance are taken to effectively improve slab surface transverse crack defects, the occurrence rate of transverse crack is basically controlled below 0.5%. The effect is relatively obvious.

关 键 词：AH60C 宽板坯 表面横裂 控制措施 

分 类 号：TG142.15[一般工业技术—材料科学与工程]