Method for making composite aluminum alloy round ingot blank

The invention provides a method for making a composite aluminum alloy round ingot blank, which comprises the following steps of: firstly, melting an outer aluminum alloy layer in a melting furnace, keeping a temperature in a range of 690-740 DEG C after gas and slag removal treatment and precipitating; secondly, putting a core aluminum alloy bar in a preheated die after heating the core aluminum alloy bar to reach 200-610 DEG C, and centering through a base in the die; sequentially pouring an aluminum alloy melt treated by refining in the die through a guide device, and stopping pouring after the core alloy bar is uniformly and fully wrapped by the alloy melt; and opening the die after the melt is fully condensed and taking out an ingot to obtain the composite aluminum alloy round ingot blank. The composite aluminum alloy round ingot blank made by the method has the advantages that the thickness of an inner layer and an outer layer is uniform, the inner layer and the outer layer are firmly combined, and the c