Crack of aluminum alloy die casting parts
1. The content of iron is too high or the content of silicon is too low.
2. The content of harmful impurities in the alloy is too high, which reduces the plasticity of the alloy.
3, aluminum-silicon alloy, aluminum-silicon-copper alloy containing zinc or copper content is too high; aluminum-magnesium alloy contains too much magnesium
4, the mold, especially the core temperature is too low
5, the casting wall thickness changes drastically
6, the mold holding pressure time is too long
7. Uneven force when jacking out