Degree Aluminium
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Degree Aluminium
A Summery of Knowledge About Aluminium Casting
As is well known, aluminium casting is characterized by excellent mechanical and physical properties. It has different degrees of strength, hardness and tenacity. At the same time, it has some special properties, such as wear resistance, high-temperature resistance and corrosion resistance.
the weight of aluminum casting is in a wide range. The lightest one has only several grams in weight. The heaviest one has 400 tons in weight. As for the size of aluminum casting, it also has a wide range, from 0.5 millimeter to 1 meter. On the basis of different weights and sizes, this casting can be widely used in different sectors.
Generally speaking, the quality of aluminum casting depends on its appearance quality and internal quality. People can judge the appearance quality through observing the roughness of the surface. As for the internal quality, it can be judged through X-ray. The quality of aluminum casting has a direct influence on the properties of mechanical products. For example, the abrasion resistance of this casting is closely related with the accuracy of machines. The size of aluminum casting can influence the working efficiency of machine. The strength of the casting has a direct influence on the service life of machine.
after we have realized the importance of aluminum casting, a question that naturally comes to our mind is that what factors can influence its quality. Generally speaking, the factors can be concluded as follow. First, the quality has something to with design for manufacturability. When people design this casting, they should take the following items into account, such as working condition, properties of aluminum and casting technology. Second, the quality is related with casting technology. People should choose the suitable molding pattern and core-making method according to the casting's structure, weight, size and production condition. Third, the quality of this casting is easily influenced by the quality of raw material. If raw materials are not qualified, the quality of the casting will be very poor.
Last but not least, let us talk about the selection of casting method for the Aluminium Casting. In the normal situation, sand casting is widely used to produce the aluminium casting, especially green sand casting. Compared with other methods, the sand casting is low in cost, simple in manufacturing technology and short in production cycle. In addition, because the manufacturing equipment and molds are very expensive, the aluminum casting is suitable for mass production.
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hw mch will a bar of aluminium 100 cm long expand wen heated frm 20degree c to 100 degree c? coefficient of li?
coefficient of linier expansion of aluminium is 0.000025.
Length of bar=100cm
=1metre
change in Temperaturee =100-20
=80 c
coefficient of expansion=0.000025
so
Expansion in bar=Length of bar * change in temperature * coefficient of expansion
=1 * 80 * 0.000025
=0.002m
=0.2cm
KT 363D-Thermal-break Profile 45-degree Cutting Machine