EFFECT OF HOMOGENIZATION TREATMENT CONDITIONS ON THE RECRYSTALLIZATION BEHAVIOR OF AL-1.2MN ALUMINUM ALLOY SHEETS

摘要

Aluminum foil is commonly used as a cathode current collectorwithin lithium ion battery. To reduce thickness of the foil, onekind of high strength Al-1.2Mn alloy has been developed. In itsfabrication process, the recrystallization structure afterintermediate annealing greatly affects the surface topography offoil. In this study, the relationship between recrystallizationstructure during intermediate annealing after rolling andhomogenization treatment conditions of Al-1.2Mn alloys hasbeen investigated. Homogenization was carried out with onestep treatment or two steps treatment. It was found that one stephomogenization treated cold-rolling sheets had higherrecrystallization temperature and finer complete recrystallizationgrains compared to two steps homogenization treatedcold-rolling sheets. This phenomenon can be explained by therelationship between Mn precipitation and recrystallizationbehavior during intermediate annealing.