Zinc alloy is an alloy based on zinc and composed of other elements. The commonly added alloy elements are aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys. Zinc alloy has low melting point, good fluidity, easy fusion welding, brazing and plastic processing, corrosion resistance in the atmosphere, and easy recovery and remelting of residual waste; However, it has low creep strength and is easy to cause size change due to natural aging. It can be made by melting, die casting or pressure processing. According to the manufacturing process can be divided into casting zinc alloy and deformation zinc alloy. It can be used for die casting instrument, car parts shell wire rod surface galvanized anti-corrosion, boiler water wall pipe hot dip zinc treatment to improve high temperature corrosion resistance.
Aluminum alloy is a general alloy name that based on aluminum.The main alloying elements are copper, silicon, magnesium, zinc, manganese, minor alloying elements are nickel, iron, titanium, chromium, lithium and so on. Aluminum alloy is a kind of nonferrous metal structural material widely used in industry, which is widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry.
ⅠDifference in die casting process
①The melting temperature of the two alloys is different. The temperature of zinc alloy is more than 400 degrees, and that of aluminum alloy is more than 700 degrees.
②Processing equipment is different, although they are called die-casting machines, but they can not be used universally.
③Processing technology and parameters are different.
The affinity between zinc alloy and iron is poor, so the die inclination can be very small, generally about 0.5 °, while that of aluminum alloy is generally 1 ~ 1.5 °.