Abstract:Aiming at exploring the effect of cold-rolled aluminum alloy scrap on the microstructure of cast-rolling plate for double zero aluminum foil, cast-rolling plates for double zero foil were produced with the addition of cold-rolled aluminum alloy scrap(0%, 1%, 2%, 3%, 4%, 5%,mass fraction), the microstructure of the alloys, the morphology characteristics and chemical composition of the inclusions have been investigated by means of metallographic microscope(OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS),and the relationship between cold-rolled scrap and inclusion defects was discussed.The results show that the addition of cold-rolled scrap has an important influence on the microstructure and inclusion defect formation of cast-rolling aluminum plates for double zero aluminum foil. When the addition of cold-rolled scrap is 0%(mass fraction), no obvious inclusion defect is found in the cast-rolling plate.When the addition of cold-rolled scrap is 1%(mass fraction), slight irregular inclusions are found in the cast-rolling plate. With the increase of the amount of cold-rolled scrap in the melt, the irregular inclusions in the cast-rolling plate become more and more serious. Energy spectrum analysis shows that inclusions are mainly composed of oxides, carbide, intermetallic compounds and adsorbed impurity elements.