High-strength 6082 aluminum alloy material and preparation method thereof

The invention belongs to the field of preparation and processing of non-ferrous metal materials, and particularly relates to a high-strength 6082 aluminum alloy material and a preparation method thereof. The aluminum alloy material comprises the following components in percentage by weight: 0.7%-0.9% of magnesium, 0.7%-1.0% of silicon, 0.4%-0.6% of manganese, 0.2%-0.4% of iron, 0.06%-0.2% of rare earth La and the balance of Al. The preparation method comprises the following steps: preparing alloy raw materials according to the component requirements of 6082 aluminum alloy; melting an aluminum ingot; adding magnesium, silicon and iron; carrying out purification treatment on the aluminum alloy melt; adding rare earth into the alloy melt and carrying out sufficient stirring and heat preservation; cooling and solidifying the alloy melt through a crystallizer to obtain an aluminum alloy cast ingot; carrying out homogenization treatment on the aluminum alloy cast ingot; carrying out shape treatment; carrying out so