Effect of Annealing Process on Recrystallization Structure, Texture, and Precipitates of 1235D Aluminum Sheets

The microstructure of cold-rolled sheets is one of the important factors affecting the performance of battery aluminum foil products. The effects of wide-range annealing temperatures on the microstructure, texture, and precipitates of 1235D cold-rolled sheets were studied by theoretical calculation combined with experimental research. The results show that under the same annealing time conditions, as the annealing temperature increases from 360 to 560 °C, there is an optimal annealing temperature to obtain the minimum recrystallization grain size, about 480 °C. The texture strength shows a trend of first decreasing and then increasing with the increase of annealing temperature. Its essence is the disappearance of rolling texture and the formation of recrystallized texture. The annealing temperature also significantly influences the conversion and size of the precipitates in the cold-rolled sheets.