A kind of preparation method and die-casting method of anodic oxidation die-casting aluminum alloy material

Abstract

The invention provides a method for preparing an anodic oxidizable die-casting aluminum alloy material and a die-casting method. The preparation method includes the following steps: first put in 80%-90% aluminum ingots, and when the temperature rises to 850°C-880°C, add manganese element additives , titanium element additives; put in the remaining aluminum ingots, lower the temperature of the molten aluminum and control it at 740°C-780°C, and carry out refining and purification; sampling and testing; when the composition of the metal solution is within the following range: Si≤0.2%, Fe≤0.2% , Cu≤0.3%, Mn 0.5%‑2%, Mg≤0.3%, Zn≤0.5%, Ti 0.01%‑0.30%, rare earth metals 0.01-2.5%, Pb≤0.1%, Sn≤0.01%, Cd ≤0.01%, the total amount of other impurities and not more than 0.3%; the balance is aluminum; cast aluminum alloy ingots. The aluminum alloy material obtained by the preparation method provided by the invention has good die-casting performance and the performance of anodic oxidation and coloring to produce glow after die-casting.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and in particular relates to a preparation method and a die-casting method of an anodic oxidizable die-casting aluminum alloy material. Background technique [0002] Aluminum alloy is a metal material widely used in various fields. In order to make aluminum alloy more corrosion-resistant and to color aluminum alloy parts, aluminum alloy is usually placed in an electrolyte for anodic oxidation, thereby forming an oxide film on its surface , to protect the aluminum alloy and improve the hardness of the aluminum alloy. However, commonly used die-casting alloys such as aluminum-silicon alloys, aluminum-copper alloys, and aluminum-magnesium alloys cannot be anodized and colored. In die-casting aluminum alloys, usually, the content of silicon is as high as 6%-12%, and the content of copper is also high. A high content of silicon will make the oxide film gray, and copper will make the oxide fil...

AI Technical Summary

Problems solved by technology

Therefore, existing die-cast aluminum alloys cannot be anodized due to their composition

[0003] The existing aluminum alloy materials used for anodizing, because of the high content of aluminum, the fluidity of the aluminum liquid is poor, the traditional production method generally cannot be manufactured by die-casting, even if it is barely die-casting, its subsequent anodic oxidation And after the coloring treatment, the flow lines of the die-casting parts are serious, the effect is not good, and the production cost is high

[0004] Therefore, there is a lack of a method for preparing anodic oxidation die-casting aluminum alloy materials that can achieve anodic oxidation, coloring, and die-casting, and have better performance.

Images