热轧卷表面夹杂缺陷的分析与控制  

Analysis and control of surface inclusion defects of hot-rolled coil

作　　者：杨治争[1,2] 李光强[1] 饶江平[1,3] 王延峰[1,3] 彭著刚[2] 洪霞[2] 

机构地区：[1]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 [2]武汉钢铁(集团)公司研究院,湖北武汉430080 [3]武汉钢铁股份有限公司炼钢总厂,湖北武汉430083

出　　处：《武汉科技大学学报》2012年第1期1-4,8,共5页Journal of Wuhan University of Science and Technology

摘　　要：对低碳热轧卷表面夹杂缺陷形貌、分布规律及相应成分进行分析。结果表明,结晶器保护渣卷入是引起低碳热轧卷表面夹杂缺陷的主要根源。在研究结晶器卷渣机理的基础上,通过调整保护渣成分,提高保护渣的黏度,并调整浸入式水口结构,优化结晶器流场,同时改进相关的工艺条件,使该类缺陷的发生率得到有效控制,由此引起的改判率也由4%降至0.2%以下,总体效果显著。Through analyzing the morphology, distribution and components of surface defects on low- carbon coil in a certain factory, the paper found that mould powder entrapment is the key cause of the defects. Based on the mechanism of powder entrapment in the mould, it developed a type of high vis- cosity powder by adjusting the chemical components, optimized the flow field of the mould by modif- ying the structure of SEN, and improved other relevant process conditions. Consequently, the inci- dence rate of the defects was under effective control and the degradation rate of the coil caused by the defects dropped from more than 4 percent to less than 0.2 percent, a remarkable improvement indeed.

关 键 词：表面夹杂 卷渣 黏度 流场 

分 类 号：TF777.1[冶金工程—钢铁冶金]