High-Speed Twin Roll Casting of Thin Aluminum Alloy Strips Containing Fe Impurities

摘要

In this work, the mechanical properties of roll-cast recycled aluminum alloy were investigated. Fe was added to 6111 aluminum alloy to simulate recycled aluminum alloy. The Fe content was varied between 0.14 and 1.02 mass percent. A high-speed twin roll caster was used because it exhibits better cooling characteristics than the conventional twin roll casters. The strip was cast at a speed of 60m/min and the resulting strip microstructure was not columnar, but equiaxed or globular. When the Fe content was 0.4 mass percent, the Fe content does not appear to exert any influence on the tension test results after T6 heat treatment, and after a 180-degree bending test no cracks occurred on the outer surface.