Aluminum casting application range is very wide, involves quite a lot of products and industrial category. But in all these applications, if with the great number of them, the rich variety of commodities, the strict, high quality and consumption of the metal materials of aspects of a comprehensive, should first automobile industry.
The amount of aluminum castings in vehicles are increasing year by year, application range has also been gradually expanding. In general, the way of castings in automobile application into three aspects: 1, shell parts, such as clutch shell, gearbox shell, etc.; 2, engine parts; Other engine parts.
Aluminum castings in electrical equipment, medical equipment, machine tool accessories, general hardware accessories, and other fields are applied widely. More advantages compared with the pure aluminum, aluminum alloy, 1. Light weight. The density of pure aluminum is 2.79 / crn3, the density of aluminum is 2.03-2.859 / cm3, about 1/3 of the steel and copper. 2. A suitable tensile strength. Aluminum and its alloy after proper treatment, its strength can be very low to very high changes over a large area, meet the needs of different environments. Although the industrial pure aluminum, especially under the condition of high purity aluminum in full annealing is very soft (the latter tensile strength is about 50 mpa), but by alloying and other strengthening methods, such as strengthening, solid solution strengthening and precipitation strengthening payable, etc.) to improve its strength by the suitable for the intended target level. 3. The specific strength, high modulus of elasticity. 4. Good corrosion resistance. Aluminum alloy has good corrosion resistance, because its surface has a layer of thin, dense continuous oxide film. 5. A larger production and processing advantages. An obvious advantage of aluminum is a relatively low melting point (pure aluminium: 660 "C) and easy melting and casting in air beautiful without any solvent protective covering or inert gases protection, this makes the alloy melting and casting operation is simple. Aluminum itself has a soft face-centered cubic crystal structure, so the aluminum nature easy processing and general machining deformation technology available. In addition, aluminum is fast and the machinability of economy, especially for those conventional casting alloy and using special especially of free-cutting alloy bar.
