High-hardness and high-surface-quality aluminum alloy profile and processing method thereof

The invention relates to a high-hardness and high-surface-quality aluminum alloy profile and a processing method thereof. The processing method comprises the following steps: smelting and casting; carrying out homogenization treatment to obtain an aluminum bar; the aluminum bar is fed into a line frequency furnace to be heated to 520-540 DEG C and then fed into a high-temperature furnace to be heated and subjected to heat preservation, and the heating and heat preservation temperature ranges from 530 DEG C to 540 DEG C; the temperature of an aluminum bar on a machine is 520-530 DEG C, the temperature of a mold is 450-480 DEG C, and the temperature of a profile outlet is 520-540 DEG C; carrying out online quenching; and straightening, saw cutting, framing and artificial aging treatment are conducted, and the aluminum alloy profile is obtained. According to the machining method, on the premise that the risk of aluminum alloy ingot production is not increased, the aluminum alloy profile with the hardness of 105