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Properties and applications of aluminum castings.

Cast aluminum alloy has some advantages that other castings can not compare, such as beauty, light quality, corrosion resistance and other advantages, so that it is widely favored by users, especially since the automobile lightweight, cast aluminum alloy castings have been widely used in the automobile industry.

The density of cast aluminum alloy is lower than cast iron and cast steel, but the specific strength is higher. Therefore, under the same load condition using aluminum alloy castings, can reduce the weight of the structure, so in aviation industry and power machinery and transportation machinery manufacturing, aluminum alloy castings have been widely used. Aluminum alloy has good surface luster, good corrosion resistance in the atmosphere and fresh water, so it has a wide range of uses in the manufacture of civilian vessels. 

Pure aluminum in nitric acid, acetic acid and other oxidizing acid medium has good corrosion resistance, so aluminum castings in the chemical industry has a certain use. Pure aluminum and aluminum alloy have good thermal conductivity, heat exchange devices used in chemical production, and power machinery requirements with good thermal conductivity parts, such as the cylinder cover and piston of internal combustion engine, are also suitable for manufacturing with aluminum alloy.

Aluminum alloy has good casting performance. Due to the low melting point (the melting point of pure aluminum is 660.230C, and the pouring temperature of aluminum alloy is generally about 730 ~ 750oC), casting methods such as metal mold and pressure casting can be widely used to improve the internal quality, dimensional accuracy, surface smoothness and production efficiency of castings. Due to the large latent heat of solidification, under the same weight condition, the duration of solidification process of liquid aluminum alloy is much longer than that of cast steel and cast iron, and the discharge fluidity is good, which is conducive to the casting of thin wall and complex structure.

Aluminum alloy casting has many advantages, which makes it become the development direction of the casting industry and one of the most popular casting products for purchasing customers. In the future, with the progress of aluminum alloy casting technology, it will show its style on a larger stage.

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