The density of aluminum alloy die castings is lower than that of cast iron and cast steel, but the specific strength is higher. Therefore, the use of aluminum alloy castings under the same load can reduce the weight of the structure, so aluminum alloy castings are widely used in aviation industry, power machinery and transportation machinery manufacturing. Aluminum alloy has good surface gloss and good corrosion resistance in atmosphere and fresh water, so it is widely used in the manufacture of civil utensils. Pure aluminum has good corrosion resistance in oxidizing acid media such as nitric acid and acetic acid, so aluminum castings also have certain uses in chemical industry. Pure aluminum and aluminum alloys have good thermal conductivity, and are also suitable for heat exchange devices used in chemical production and parts requiring good thermal conductivity in power machinery, such as cylinder heads and pistons of internal combustion engines.
Aluminum alloy die castings have 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 around 730 ~ 750 oc), 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. Because of the high latent heat of solidification of aluminum alloy, the solidification process of molten aluminum lasts much longer than that of cast steel and cast iron under the same weight, and has good fluidity, which is beneficial to casting thin-walled and complex castings.
Alloy aluminum casting has many advantages, which makes it the development direction of casting industry and one of the most popular casting products for buyers. In the future, with the progress of aluminum alloy casting technology, it will show its elegance on a larger stage.