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Process characteristics of zinc alloy and aluminum alloy die casting

September 26, 2024
1.Process characteristics of zinc alloy Die Casting
1) Zinc alloy has the characteristics of small crystallization temperature range, low melting point, easy filling and forming, not easy to produce loose, not easy to produce sticky mold, and can extend the life of die casting die.
2) Zinc alloy has high mechanical properties, can be die-cast a variety of complex, thin-wall castings, the castings can be a variety of surface treatment, especially with good electroplating, and has good room temperature performance.
Aluminum alloy die-casting melting point is high
3) Zinc alloy will shrink in size after die casting, and the alloy composition has a greater impact on the size change, the size of zinc alloy castings without copper is more stable, and the size of general zinc-aluminum alloy castings does not change much.
4) The zinc alloy has a narrow working range, and its impact toughness decreases sharply when the temperature is below 0℃, while the mechanical properties decrease significantly when the temperature exceeds 100℃.
5) Zinc alloy is easy to age, and the aging phenomenon is manifested in the increase of volume, the decrease of strength and the decrease of plasticity. The main reason is that impurities such as lead, tin and cadmium are too small to dissolve in zinc, so the impurity content should be strictly controlled when selecting materials and melting.
6) Zinc alloy die casting because the melting point is about 400℃, the general use of hot die casting machine
7) Zinc Die Casting can be eccentric and center pouring
8) Zinc die casting gate is slightly thin
9) Zinc die casting mold generally watering
Aluminum alloy die-casting melting point is high
 
2.Process characteristics of aluminum alloy die casting 
1) Aluminum alloy die-casting melting point is high, generally with cold die-casting machine
2) The density of aluminum alloy is small, and a die casting can be large and complex
3) Aluminum Die Casting eccentric pouring
4) The aluminum die casting gate is slightly thick
5) Aluminum die casting mold is generally oiling (also watering)
 
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