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What are the defects of zinc alloy die casting
Copy from:    Author:kenostian    Time:2016-03-18 20:26:28    Popularity:432

    Zinc alloy die casting has the advantages of easy die casting, high dimensional accuracy, good mechanical processing performance, high production efficiency and low cost. But it is not perfect in every respect. The defects of zinc alloy die casting:
    Poor corrosion resistance. If the impurity elements overproof will lead to aging and deformation of the casting in zinc alloy. As the swelling volume, the obvious decline in mechanical properties(especially plasticity), a long time or even rupture.
    The zinc alloy is mainly composed of the aluminum solid solution containing zinc with the zinc solid solution containing aluminum and copper. Their solubility decreased with the decrease of temperature. But the solidification rate of the zinc alloy is very fast, so when the temperature drops to the room temperature, the solubility of solid solution is supersaturation. After a period of time, the phenomenon of excessive saturation will gradually disappear, then the shape and size of the casting will have a slight change.
   
Zinc die casting parts can not be used at high temperature and low temperature. Zinc alloy has good mechanical properties at room temperature, but its tensile strength at high temperature and the impact resistance at low temperature will be significantly reduced.


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