Analysis of Uneven Spangles Defects in Galvalume Coatings and Control Measures
This study conducted a thorough analysis of the uneven spangles defects in the production process of galvalume steel sheets.Through adjusting the parameters of different positions on the corrective rollers,optimizing the tension control in the cooling tower,exploring the low-temperature annealing process for specific grades,and improving the corrective ability of 6# corrective roller and the thickness of hot coils,effective methods for improving the uniformity of spangles defects were successfully identified.The research results indicate that the main factors affecting the uniformity of spangles in galvalume coatings include corrective ability,submerged roller parameter settings,and annealing temperature control.Through systematic troubleshooting and experimentation in the actual production process,not only the causes of the uneven spangles defects were revealed,but also practical solutions were proposed.
Al-Zn coatinguniformity of spanglescorrective abilitysubmerged roller parametersannealing temperature
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