Aluminum alloy, preparation method thereof, structural member and mobile phone

The invention provides an aluminum alloy and a preparation method thereof, a structural member and a mobile phone, and based on the total mass of the aluminum alloy, the aluminum alloy comprises the following components in percentage by mass: 8-12 wt% of Si; 0.9 wt% to 1.4 wt% of Mg; 0.3 wt% to 0.4 wt% of Fe; 0.05 wt% to 0.15 wt% of Ti; 0.01 wt% to 0.03 wt% of C; 0.005 wt% to 0.03 wt% of a component B; 0.1 wt% to 0.2 wt% of Sc; 0.3 wt% to 1.0 wt% of Sm; 0.03 wt% to 0.05 wt% of Sr; 0.003 wt% to 0.03 wt% of Ca; and from 84.71 wt% to 90.302 wt% of Al. The aluminum alloy has excellent strength and relatively high thermal conductivity. 本申请提供了铝合金及其制备方法、结构件和手机，基于所述铝合金的总质量，按照质量百分比计，所述铝合金包括：8wt％～12wt％的Si；0.9wt％～1.4wt％的Mg；0.3wt％～0.4wt％的Fe；0.05wt％～0.15wt％的Ti；0.01wt％～0.03wt％的C；0.005wt％～0.03wt％的B；0.1wt％～0.2wt％的Sc；0.3wt％～1.0wt％的Sm；0.03wt％～0.05wt％的Sr；0.003wt％～0.03wt％的Ca；以及84.71wt％～90.302wt％的Al。该铝合金具有出色的强度和较高的导热率。