Influence of Air-Knife Wiping on Coating Thickness in Hot-Dip Galvanizing

被引:0
作者
ZHANG Yan1
2.University of Science and Technology Liaoning
3.Angang Steel Co Ltd
机构
基金
中国国家自然科学基金;
关键词
hot-dip galvanizing; air knife; air jet wiping; numerical simulation; coating thickness;
D O I
10.13228/j.boyuan.issn1006-706x.2012.06.009
中图分类号
TG174.4 [金属表面防护技术];
学科分类号
080503 ;
摘要
In hot-dip galvanizing process,air jet wiping control is so crucial to decide the coating thickness and uniformity of the zinc layer on the steel strip.The mathematical models developed predict the zinc coating thickness as a function of pressure and shear stress.The required pressure and shear stress profile on the strip surface were calculated using regression analysis,and carried out using numerical simulation as FLUENT,a finite element analysis software.The influences of the outlet pressure,the nozzle to strip distance,the slot opening,the edge baffle plate,as well as the tilting angle of air knife were discussed.Combining with these results and regression analysis on the practical data,four first-order polynomial multi-parameter models were established for different targeted coating thicknesses with better regression coefficients.The validated model was used to carry out sensitivity analysis to determine the favorable controlling regime for the air jet wiping process.
引用
收藏
页码:70 / 78
页数:9
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