The strength and surface hardness of aluminum casting are higher than other casting process.
Because of the chilling effect from die casting mould and the crystallization under pressure. The grain size of the surface layer in die castings is finer and the structure is more compact, so we can get higher hardness and strength on die casting par. The tensile strength of die castings is generally 25%-30% higher than sand castings, however the elongation of die casting is lower.
Parts with thin wall and complex shape can easy be manufactured through die casting process.
Because the forming process of die-casting part is filled and solidified under pressure from die casting mould, the shape of peaks, valleys, convex, concave and narrow grooves can be clearly formed in die casting process. The minimum wall thickness of aluminum alloy die casing part can reach as lower as 0.5 mm. Meanwhile the minimum diameter of die casting hole can meet as lower as 0.7 mm.
As for the parts which is with complex shape and difficult to be machined or non-machinable, die casting process can always meet their requirement , especially when other casting methods or other metal forming processes are difficult to manufacture them.
High producing efficiency in mass production
Die casting, which is suitable for mass production, is one of the most productive process among all casting methods. This is mainly determined by the characteristics of die casting process. Generally the cold chamber die casting machine can die cast 300 to 700 times per shift on average, Each operation cycle generally need 10 second to 1 minute, on the other hand the multi-cavity process can be realized in die casting process, so its output is doubled or multipled. Compared with other casting methods, die casting technology is usually much saving the deep machining process hours and deep machining equipment. So customers can spend lower cost to get die casting parts in mass production.
Embed other materials before casting
During die casting production, other metal or non-metal parts can be pre-embedded to improve the local strength of die castings, in order to meet some special requirements (such as wear resistance, insulation, magnetic conductivity, etc) and improve the technological properties of the casting structure. So die casting can obtain parts with complex shape, high precision, stable size, good interchangeability, higher mechanical properties and lower cost.
Anti-corrosion property due to alumina film on surface
After die casting, there will be a dense thin aluminum oxide film on the surface of die casting parts. Due to the film, die castings can get anti-corrosion properties even in the environment of seawater and nitrate.
Die casting mould need more cost
Die casting mould need higher cost. Usually die casting mould is more complex and expensive than common casting method. But if mass production, The unit price is lower.
Cost is lower in China aluminum alloy die casting foundry
Die casting process is widely used in China casting factory. And it has already became a very mature technology in China. Global customers can obtain lower cost equal quality die casting parts in china, especially the parts with deep machining process.
