[Aluminum] Aluminum die casting materia

Aluminum die-casting materials have the characteristics of adjustable material thickness, good precision, high yield and good productivity. Aluminum-copper-silicon alloy is widely used in the industry. However, the material contains a large amount of silicon, copper, release agents and other substances that affect surface treatment. In addition, when the temperature goes from high temperature to rapid cooling during casting, a large number of crystal structures are produced on the surface. Due to the gas contained inside during the die-casting process, pores are easily generated inside and on the surface of the workpiece. In addition to making it difficult to obtain a uniform film, it will also affect the surface effect.

Anodizing : A-Excellent、B-Good、C-Fair、D-Difficulty

Because the appearance of aluminum die-casting parts is inferior to that of ordinary aluminum alloys, it is widely used in workpieces such as functional parts or internal components where appearance is not important.

As mentioned in the content just now, the anode treatment is difficult due to the residual substances such as silicon, copper and release agents on the surface, so pre-treatment is relatively important. Generally, concentrated nitric acid, hydrofluoric acid and other chemicals are used to clean the surface of the workpiece to reduce the amount of workpiece passing through the anode. Poor surface after treatment.