Study on the Formation Mechanism and Control of Untrimmed Aluminium Foil’s Surface Dirty Defect

Jing Zhong Gao; Shu De Zhou; Guo Liang Zhang; Xiang Hua Kong

doi:10.4028/www.scientific.net/AMR.485.433

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 485Study on the Formation Mechanism and Control of...

Study on the Formation Mechanism and Control of Untrimmed Aluminium Foil’s Surface Dirty Defect

Abstract:

The surface dirty defect of untrimmed aluminum foil was analyzed by SEM and EDS. The results show that the amount of the aluminum powders on the cold rolling sheet is too much, which caused the surface dirty defect. The quantitative analysis of dealumination demonstrated that the oil film strength of rolling process is the key factor to solving the dirty defect, the larger oil film strength, the smaller dealuminated quantity. When oil film strength is more than 290 N, dealuminated quantity will decrease. By increasing casting rate and improving oil film strength in sheet and strip process, the surface dirty defect on untrimmed surface is successfully eliminated.