锌铝镁镀层锌流纹的形成原因与控制  

Causes of Formation of Zinc Streaks on Zinc-aluminum-magnesium Coating and Controlling

作　　者：王松 张志远 冯康杰 周仕泽 WANG Song;ZHANG Zhiyuan;FENG kangjie;ZHOU Shize(Technology Center,Shanxi Jianlong Industrial Co.,Ltd.,Yuncheng 043801,Shanxi China)

机构地区：[1]山西建龙实业有限公司技术中心,山西运城043801

出　　处：《热处理》2024年第6期52-55,共4页Heat Treatment

摘　　要：某钢厂的镀覆40μm厚锌铝镁镀层的带钢表面发现有锌流纹。分析了锌流纹的形成原因,并进行了带钢的3次试生产。结果表明:带钢表面的锌流纹形成与气刀压力、气刀间隙,带钢入锌锅温度及锌液温度等镀覆工艺参数有关。通过将气刀开口度调整到1.0(中间)~1.2mm(边缘),气刀压力降低到8kPa,气刀间隙调整为8mm,以及将带钢入锌锅温度及锌液温度提高至450℃,带钢表面的锌流纹已基本被消除。The steel strip on which 40-μm-thick zinc-aluminum-magnesium coating was fabricated was found to have zinc streaks at surface in a steel plant.The reason why the zinc streaks formed was analyzed,and the trial-productions of steel strip were performed three times.The results indicated that the formation of zinc streaks was related to plating process parameters such as pressure and gap of air knife,temperature at the time of steel strip entering into zinc liquid top,and zinc liquid temperature.The zinc streaks on the steel strip have been eliminated mostly by adjusting the air knife opening degree to 1.0(middle)-to-1,2 mm(side),reducing air knife pressure to 8 kPa,and increasing both the temperature at the time of steel strip entering into zinc liquid top and the temperature of zinc liquid to 450℃.

关 键 词：带钢 锌铝镁镀层 锌流纹 气刀 

分 类 号：TG142[一般工业技术—材料科学与工程]