Process softening when the material is deformed by rolling. The rolling speed of the high-speed aluminum foil rolling mill is very high. As the rolling speed increases, the temperature of the rolling deformation zone increases. According to calculations, the metal temperature in the deformation zone can rise to 200°C, which is equivalent to an intermediate recovery annealing, thus causing Process softening phenomenon of rolled materials.
The melt used to produce aluminum foil blanks must have high metal purity, the melt must contain low slag and gas content, and the hydrogen content after refining the melt must be controlled below 0.12mL/(100g aluminum). The cast and rolling blanks produced must not Internal quality defects such as air channels and slag inclusions are produced, and the grain size reaches the first level.
The surface quality of wool directly affects the surface quality of aluminum foil. The surface quality of the blank must be strictly controlled. The surface must be clean, flat, and corrosion-free. Defects such as oil spots, holes, metal and non-metal intrusions, dark lines, scratches, etc. are not allowed on the surface.
