What are the features of zinc alloy die casting parts?

Zinc alloy die casting parts have been widely used in many industries, but do you know the advantages of zinc alloy diecast parts? Do you know what to pay attention to when using zinc alloy die castings?

In the case of the raw material of zinc alloy die casting parts, the density of zinc alloy is 7.1 g/m3 and the melting point is 382-386 degrees. Zinc alloy has low melting point, good liquidity. So that the zinc alloy is very suitable for thin-walled die castings and it has good corrosion resistance in dry air and atmosphere.

Zinc die casting parts mainly have the following advantages:

1. Zinc alloy die casting parts can have complex shapes and thinner walls.

2. Most of zinc alloy diecast parts have excellent tensile strength and dimensional stability.

3. Diecast part of zinc alloy material have excellent RFI/EMI shielding capabilities.

4. Zinc die casting parts have longer life with minimal maintenance.

Besides these good features, there are several points we need to pay attention when you use the zinc alloy die casting part. 

1.The corrosion resistance of zinc alloy die casting is poor. 

When the impurity element of lead, cadmium and tin in the alloy composition exceed the standard, the zinc alloy diecast part is aged and deformed, which is characterized by a large volume expansion, mechanical performance especially the plasticity is decreased significantly, after a long time it is  even ruptured. The solubility of lead, tin and cadmium in the zinc alloy is very small, so it concentrates on the grain boundary and becomes the cathode, and the solid solution of the rich aluminum becomes the anode, and in the presence of water vapor (electrolyte), the electrochemical corrosion of the crystal is promoted. Zinc alloy die casting part is aged due to intergranular corrosion.

2.The aging effect of zinc alloy die casting parts. 

The organization of the zinc alloy is mainly composed of zinc-rich solid solution containing Al and Cu and rich Al solid solution containing zinc, whose solubility decreases with decreasing temperature. However, due to the extremely fast solidification speed of zinc die casting parts, the solubility of the solid solution is greatly saturated at room temperature.  After a certain period of time, this kind of oversaturation will be gradually relieved, and the shape and size of the zinc alloy die casting are slightly changed.

3.Zinc alloy die casting parts should not be used in the working environment of high temperature and low temperature (below 0 ℃). 

Zinc alloy die casting has good mechanical properties at room temperature. However, both tensile strength and low temperature impact performance are significantly reduced under high temperature.

Everything has two sides, so when you select the die casting material, you need to take into account all the characteristics to make the perfect choice. If you don't know which metal alloy die casting is more in line with your needs, you can consult us, a leading China die casting manufacturer.