Several Techniques Affecting the Yield of Zinc Alloy Die Castings
Using the properties of zinc alloy die castings.
In the zinc alloy die casting, the size of shrinkage will occur, and the alloy composition has a great influence on the dimensional change of the zinc alloy casting. The size without copper is relatively stable, and the small dimensional change is generally a zinc alloy casting.
The working range of zinc alloy is narrow, the temperature is lower than 0℃, the impact toughness drops sharply, and when the temperature exceeds 100℃, the mechanical properties decrease significantly.
The aging of the zinc alloy, in the expansion, the strength reduction reflects the aging phenomenon, and the plasticity decreases. The main reason is because the solubility of lead, tin, cadmium and other impurities in zinc is too small. Therefore, the material and melting should strictly control the content of impurities.
Master the chemical properties of zinc alloy die castings
Zinc alloy die casting In the die casting process, the influence of technology will produce zinc and aluminum-rich and zinc alloy die casting parts of the site. The aluminum-rich phase is strongly and preferentially dissolved, and the acid zinc phase is preferentially dissolved. In addition to strong alkali or acid oil or using etching process, blistering and coating peeling can be caused during electroplating, which seriously affects the yield of the product. Therefore, zinc alloy die castings are not degreasing or pickling with strong acid or alkali.
