What are the characteristics of aluminum alloy die-casting products?

1. Aluminum alloys can be divided into
Four types of rust-proof aluminum (LF), hard aluminum (LY), super-hard aluminum (LC) and forged aluminum (LD)
2. Cast aluminum alloys are divided into different categories according to the main alloying elements added.
There are four types of aluminum-silicon series (AL-Si), aluminum-copper series (Al-Cu), aluminum-magnesium series (Al-Mg) and aluminum-zinc series (Al-Zn).
Commonly used grades include ADC12 (A383), ADC10 (A380)
3. Advantages of aluminum alloy die casting
Good product quality: Castings have high dimensional accuracy, good surface finish, high strength and hardness. The strength is generally 25~30% higher than that of sand casting, but the elongation is reduced by about 70%. It is dimensionally stable and has good interchangeability. It can die-cast aluminum thin-walled and complex castings. For example, the current minimum wall thickness of zinc alloy die-casting can reach 0.3mm, and aluminum alloy die-casting can reach 0.5mm. High production efficiency: The machine has high productivity. For example, the domestic JIII3 horizontal cold air die-casting aluminum machine can die-cast aluminum 600 to 700 times on average in eight hours, and the small hot chamber die-casting aluminum machine can die-cast aluminum 3,000 to 7,000 times in eight hours on average. Excellent economic effect: Due to the advantages of precise dimensions and smooth surface of die-cast aluminum parts. Generally, it is no longer mechanically processed but used directly, or the processing amount is very small, so it not only improves the metal utilization rate, but also reduces a lot of processing equipment and man-hours. The castings are cheap, and combined die-cast aluminum can be used with other metal or non-metallic materials. , saving both assembly time and metal.
4. Disadvantages of aluminum alloy die-casting
During die-casting, due to the high speed of liquid metal filling the cavity and unstable flow state, the general aluminum die-casting method is used. The castings are prone to pores and cannot be heat treated. For castings with complex concavities, die casting is more difficult. The life of aluminum alloy die-casting molds is relatively low, with a lifespan of about 80,000 touches. It is not suitable for small batch production. The main reason is that the manufacturing cost of die-cast aluminum molds is high and small batch production is uneconomical. Aluminum alloy die-casting is not easy to be anodized. Because many bubbles or sand holes are easily left after die-casting, the appearance cannot be repaired well, and the appearance problems cannot be covered after oxidation.
Note: Here we focus on the die-casting mold times and lifespan of the aluminum mold, the die-casting aluminum grade and the reasons why the appearance cannot be oxidized.