Attention should be paid to the use of zinc alloy die casting parts process problems:
Poor corrosion resistance. When the impurity elements of lead, cadmium and tin to exceed the standard in the alloy, leading to the casting of aging and deformation, showed the volume swell, the mechanical properties decreased significantly especially plasticity, the long-term use possibly can rupture. Lead, tin, cadmium solubility is very small in the zinc alloy, so focus on the grain boundary and as cathode, high aluminium content solid solution as the anode. The water vapor (electrolyte) under the conditions of existence, to intergranular corrosion. Die casting due to intergranular corrosion and aging.
Timeliness. Zinc alloy microstructure is mainly composed of zinc solid solution contains aluminum and copper and aluminum solid solution contains zinc. Their solubility decreases with the temperature decrease. But because the pressure of the solidification of the casting speed, therefore to room temperature, the solubility of solid solution is saturated. After some time, the saturation phenomenon will gradually lifted, and the shape and size of the casting is slightly change.
Zinc alloy die casting is in high temperature and low temperature (0 DEG C) use of working environment. Zinc alloy has better mechanical properties at room temperature. But in the high temperature tensile strength and low temperature impact properties were significantly decreased.
The above article from KENOS official website (http://www.kenos-diecasting.com/)
The original address: http://www.kenos-diecasting.com/news_show_86.html, reproduced please specify. kenosblog1507
Poor corrosion resistance. When the impurity elements of lead, cadmium and tin to exceed the standard in the alloy, leading to the casting of aging and deformation, showed the volume swell, the mechanical properties decreased significantly especially plasticity, the long-term use possibly can rupture. Lead, tin, cadmium solubility is very small in the zinc alloy, so focus on the grain boundary and as cathode, high aluminium content solid solution as the anode. The water vapor (electrolyte) under the conditions of existence, to intergranular corrosion. Die casting due to intergranular corrosion and aging.
Timeliness. Zinc alloy microstructure is mainly composed of zinc solid solution contains aluminum and copper and aluminum solid solution contains zinc. Their solubility decreases with the temperature decrease. But because the pressure of the solidification of the casting speed, therefore to room temperature, the solubility of solid solution is saturated. After some time, the saturation phenomenon will gradually lifted, and the shape and size of the casting is slightly change.
Zinc alloy die casting is in high temperature and low temperature (0 DEG C) use of working environment. Zinc alloy has better mechanical properties at room temperature. But in the high temperature tensile strength and low temperature impact properties were significantly decreased.
The above article from KENOS official website (http://www.kenos-diecasting.com/)
The original address: http://www.kenos-diecasting.com/news_show_86.html, reproduced please specify. kenosblog1507
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