What is die casting?. A mold is loaded into the die casting machine, and then aluminum or aluminum alloy heated in a liquid state is poured into the material inlet of the die casting machine, and is die-casted by the die casting machine to cast an aluminum part or an aluminum alloy part having a limited shape and size of the mold. Usually called aluminum die castings.
Since metal aluminum and aluminum alloys have good fluidity and plasticity, and the casting process is cast in a pressure die casting machine, the aluminum die casting can make various complicated shapes, and can also achieve higher accuracy and accuracy. Smoothness, which greatly reduces the amount of mechanical processing of the casting and the casting allowance of the metal aluminum or aluminum alloy, not only saves electricity, metal materials, but also greatly reduces labor costs; and aluminum and aluminum alloys have excellent thermal conductivity , Smaller weight and higher machinability; thus aluminum die castings are widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump manufacturing, transmission machinery manufacturing, precision instruments, landscaping, power construction, architectural decoration And other industries.
The four processes in the die-cast aluminum industry are annealing, normalizing, quenching and tempering. In the die casting process, the relationship between quenching and tempering is very close and both are indispensable.
Annealing is to warm the workpiece. When heated to the appropriate temperature, according to the different materials selected, the die castings are slowly cooled, and the internal organization of the metal is approaching equilibrium. Normalizing is to heat the workpiece to a suitable temperature and cool it in air. It is mainly used to improve the cutting function of materials, and it can also be used to end die-casting for some parts that need less.
Quenching is to heat and heat the workpiece and quickly cool it in water or other quenching medium such as inorganic salt solution. After this procedure, the steel parts produced will be hardened and the steel parts will become brittle. In order to reduce the brittleness of steel parts, the quenched steel parts can be placed under a temperature of 650 degrees Celsius above normal temperature for a long period of time and then cooled, which is called tempering.
Application of Aluminum Die Casting Aluminum and aluminum alloys have good fluidity and plasticity, so die castings with complex shapes and difficulties can be made. Castings made of aluminum alloy and metal aluminum have high precision and surface finish. This has greatly reduced the amount of machining of castings, greatly reduced labor intensity, and saved power and metal materials.