There is no doubt about Zinc Die Castings. The technology adopted is zinc alloy die casting technology. So how much do you know about zinc die castings? The following will mainly introduce you to the relevant knowledge of zinc die castings.
The zinc element uses a specific gravity of 7, which is the specific gravity in common metal structures. Now it is relatively low for iron (specific gravity 7.7) and copper (specific gravity 9). When used as a die-casting alloy, zinc alloy and other elements such as aluminum, copper, and magnesium are regarded as impurities in the alloy.
There are four groups of traditional zinc alloys, commonly referred to as commercial "the" (abbreviated as zinc alloys, aluminum, magnesium, and copper).
The nominal aluminum content of each alloy is 4%. The mechanical properties of aluminum alloys, especially tensile strength and impact strength. The relatively low aluminum concentration makes the alloy have a low melting point, is easy to cast, and allows for extended mold life.
Iron, lead, cadmium, and tin are considered bad molecules and are restricted to low or very low levels. The high iron content forms bad metal particles. Lead, cadmium, and tin, even at very low concentrations, can cause intergranular corrosion when magnesium in the crystal structure of the aluminum-zinc alloy system is absent.
After years of development, zinc suppliers often produce raw metals that meet purity standards. All zinc alloys produced in the United States and Canada are raw metals that meet purity specifications.
Common attributes
(1) Mechanical properties: all alloys have the same elastic modulus, shear modulus and poison ratio. Compressive strength is about 50% higher than tensile strength. The room temperature impact strength of zinc alloy is the highest die casting alloy.
(2) The influence of temperature: The mechanical performance data is at room temperature, and some significant changes with relatively small changes in temperature.
(3) Casting performance: Zinc alloy has a small tendency to attack steel at the casting temperature. This feature, combined with lower pouring temperature, low mold maintenance and long mold life results. These characteristics also make zinc alloy cast by hot box method.
(4) Plating: Zinc alloy can realize economical bright plating and durable chrome plating. This makes their die-casting materials optional for hardware applications.
(5) Aging: The die casting process is characterized by very rapid solidification. The phenomenon of zinc alloy lock is a crystal structure, which is unstable at room temperature.
Zinc aging
Over time, metal molecules slowly migrate to a stable mode, an effect called aging. The two forms of aging are:
{1} The ductility increased slightly, and the tensile strength, impact strength and hardness decreased.
{2} There is a slight contraction.
So there is so much knowledge about zinc die castings. For more, please visit: China Zinc Die Casting Manufacturer.
