Causes and solutions for cracks in aluminum alloy die castings? Aluminum alloy die-casting parts have sharp corners, excessive impurities in the alloy, premature or delayed removal of castings, and uneven mold temperature due to die casting mold shaking. Exclusion methods:
1. Mastering the same method of mold opening: If the mold is opened too early, the casting strength is low, and it is easy to crack when ejected. If the mold is opened too late, the shrinkage of the casting will be hindered and increased, and cracks will also occur;
2. Change the design of the cavity by creating a circular arc for any sharp corners, and a circular arc transition for areas with significantly different wall thicknesses to eliminate stress concentration and avoid cracks;
3. The melting temperature should not be too high. If the temperature is too high, the alloy is prone to oxidation and coarse crystallization, resulting in a decrease in mechanical properties and causing the alloy to become brittle and crack;
4. The chemical composition should be correct, and the content of aluminum alloy should not exceed 1.5%; The zinc content should not exceed 0.3;
Product Categories : Aluminum Die Casting
