Q195热轧带钢大型夹杂物来源分析及控制  

Source analysis and control of large inclusions in Q195 hot rolled strip

作　　者：王博 邹平 孙秀兵 李建军 孙立根 朱立光 WANG Bo;ZOU Ping;SUN Xiu-bing;LI Jian-jun;SUN Li-gen;ZHU Li-guang(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Hebei Province High Quality Steel Continuous Casting Engineering Technology Research Center,Tangshan 063210,Hebei,China;・Equipment Department,Tangshan Songting Iron and Steel Co.,Ltd.,Tangshan 063000,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]河北省高品质钢连铸工程技术研究中心,河北唐山063210 [3]唐山松汀钢铁有限公司设备处,河北唐山063000

出　　处：《中国冶金》2021年第8期60-65,共6页China Metallurgy

基　　金：国家自然科学基金青年科学基金资助项目(52004093);河北省钢铁联合基金资助项目(E2018209195)。

摘　　要：大型夹杂物对热轧带钢表面质量有着重要的影响。采用示踪剂试验、大样电解的方法,对某厂Q195热轧带钢中大型夹杂物来源、成分、含量进行研究,同时对生产过程中钢包、中间包顶渣进行分析。研究结果表明,研究中大型夹杂物主要为Al_(2)O_(3)-SiO_(2)-MnO、SiO_(2)-MnO复合夹杂和SiO_(2)夹杂物,粒度为50~2 000μm,含量为(40~145) mg/10 kg,尺寸较大且含量较高,主要源于钢包、中间包顶渣、引流剂卷入。同时发现钢包、中间包顶渣氧含量较高,碱度较低。应对钢包、中间包覆盖剂进行优化,提升碱度,以达到顶渣吸附去除夹杂物的目的。Large inclusions have an important influence on the surface quality of hot rolled strip. Tracer experiment and large sample electrolysis were used to analysis the source, composition and content of large inclusions in Q195 hot rolled strip. At the same time, the top slag of ladle and tundish was analyzed and then effective measures were proposed. The results showed that the major inclusions were Al_(2)O_(3)-SiO_(2)-MnO, SiO_(2)-MnO and SiO_(2). The particle size ranged from 50 to 2 000 μm, and the content ranged from 40 mg/10 kg to 145 mg/10 kg. The main sources of inclusions were ladle, tundish top slag and drainage agent. Besides, it was found that the oxygen content of top slag of ladle and tundish is higher and the basicity is lower. The covering agent of ladle and tundish should be optimized and the basicity should be improved to remove inclusions by adsorption.

关 键 词：Q195热轧带钢 大型夹杂物 示踪法 覆盖剂 引流剂 

分 类 号：TG335.56[金属学及工艺—金属压力加工]