Comparison and Analysis of Metallurgical Quality of Aluminium Sheets Used for Easy-open Cans

Metallurgical quality and mechanical properties of experimental aluminium sheets used for easy-open cans have been compared and analyzed with those of the commercial sheets.Most inclusions in the commercial sheets were relatively coarse compounds and their content was fairly high.The size of small block phases in commercial sheets was equivalent,and was bigger than that of experimental sheet,and the distribution of the phases were more non-uniform than that of experimental sheet too.The tensile properties at room temperature of home made sheets were lower than those of foreign sheets,and anisotropy of at home made sheets was the most obvious in the three kinds of sheets.Inclusions in the sheet prepared by high-efficient melt-treatment were mainly the tiny Al2O3,the mass percentage of inclusions was only 0.273%.The small phases that distributed evenly in the matrix after rolling were mainly (Al,Fe,Mn,Mg,Si,RE) composite phases.Dimples of tensile fracture were equiaxial,and average tensile strength,average yield strength and average extensibility of experimental sheet were increased by 91%,19.6% and 12.8% respectively compared with those of home made sheets.The main mechanical properties of experimental sheet can reach the level of the imported sheet.