High-performance A356 aluminum alloy refining and toughening heat treatment process method

The invention relates to a preparation method of a high-quality A356 aluminum alloy melt. The structure of the melt is homogenized and refined through in-furnace refining and the melt is toughened through heat treatment. In order to solve the technical problem that traditional A356 aluminum alloy melting is high in hydrogen content, large in slagging and non-uniform in components, and due to highsilicon content and remarkable brittleness, the formability and aging strength of a cast ingot is difficult to counterbalance, the high-quality A356 aluminum alloy refining method which effectively homogenizes the dispersed aluminum alloy melt and enhances the purification effects of hydrogen removal and slag removal is provided; and aiming at the characteristic of phase change of A356 aluminum alloy components, solid solution temperature matched with the A356 aluminum alloy components is preferably selected, a secondary aging treatment technology is combined, so that the heat treatment process which meets comprehensi