Aluminum alloy has good surface gloss and good corrosion resistance in the atmosphere and fresh water, so it has a wide range of uses 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 the chemical industry.
Cast aluminum alloy has some advantages that other castings cannot match, such as beautiful appearance, light weight, corrosion resistance, etc. Therefore, aluminum alloy castings are widely used in the aviation industry, power machinery and transportation machinery manufacturing., making it widely favored by users, especially since the lightweight of automobiles, cast Casting Auto Mould aluminum alloy castings have been widely used in the automotive industry Applications. Therefore, the use of aluminum alloy castings under the same load conditions can reduce the weight of the structure.. The density of cast aluminum alloy is lower than that of cast iron and cast steel, but its specific strength is higher.
They are used in heat exchange devices used in chemical production, and parts that require good thermal conductivity on power machinery, such as the cylinder heads and pistons of internal combustion engines, are also suitable for aluminum alloys. manufacture. Pure aluminum and aluminum alloys have good thermal conductivity Such as commonly used door handles, door locks, radiators, water pipes, iron pots, gas stoves, irons, etc.
Therefore, the machine tool industry that provides processing and manufacturing equipment also requires product variety, which has become an important indicator of the overall strength of a machine tool industry. Castings account for a large proportion of mechanical products., to avoid or reduce defects such as component segregation, deformation and cracking of copper castings. For example, for tractors, the weight of castings accounts for about 50-70% of the total weight of the whole machine, 40-70% for agricultural machinery, and 70-90% for machine tools and internal combustion engines.
When designing, not only must the geometry and size of the machine tool casting be determined according to the working conditions and the performance of the metal material, but also the rationality of the design must be considered from the perspective of the casting alloy and casting process characteristics, that is, the obvious size effect and solidification, Shrinkage, stress, etc
