带钢表面块状黑斑成因及对策

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英文篇名：Cause analysis and countermeasures for black block mark on surface of hot rolled strip 作者：唐勤 ; 刘靖群 ; 董欣欣 英文作者：TANG Qin;LIU Jing-qun;DONG Xin-xin;Hot Rolling Department,Shougang Jingtang United Iron and Steel Co.,Ltd.;Tangshan Vocational College of Science and Technology; 关键词：热轧带钢 ; 黑斑缺陷 ; 轧制烟尘 ; 水嘴 英文关键词：hot rolled strip;;black mark;;rolling fume dust;;spray nozzle 中文刊名：ZZGG 英文刊名：Steel Rolling 机构：首钢京唐钢铁联合有限责任公司热轧作业部;唐山科技职业技术学院; 出版日期：2019-04-15 出版单位：轧钢 年：2019 期：v.36;No.227 语种：中文; 页：ZZGG201902020 页数：4 CN：02 ISSN：11-2466/TF 分类号：79-81+85

摘要

针对热轧带钢表面存在的块状黑斑缺陷,利用扫描电镜等手段分析了其形貌、成分,得出条块状黑斑的产生是由于F_7机架出口处轧制烟尘与水蒸汽混合形成灰垢集聚在F_7机架出口下导板上,最后粘附于带钢下表面而形成条块状黑斑。通过加强侧喷和除尘水嘴日常维护,有效控制了带钢表面块状黑斑缺陷。
        Aimed at the black block mark defect on the hot rolled strip surface,its morphology and chemical composition were analyzed by SEM.It concluded that the black block mark defect was caused by the compound of rolling fume dust and water vapor on the exit roller table after F_7 mill,which was sticked on the bottom surface of strip.By enhancing side spray water and making good maintenance for the dust cleaner nozzle,the black block mark defect was effectly avoided.

引文

[1] 余伟,王俊,刘涛.热轧钢材氧化及表面质量控制技术的发展及应用[J].轧钢,2017,34(3):1.
    [2] 胡亮,崔秋艳,刘瑞光.2 250 mm热连轧机组精轧工艺水的研究与应用[J].轧钢,2018,35(5):79.