Cast aluminum generally refers to an aluminum casting manufactured by a casting process, and die-cast aluminum refers to an aluminum casting manufactured by a high-pressure die-casting method, the difference being mainly due to the difference in the casting process.
     The casting process generally has casting processes such as sand casting, dewaxing casting, gravity casting, low pressure casting, ceramic casting, gypsum casting, and the like. The die casting process is a high pressure die casting, which is produced by a cold chamber die casting machine.
      The cast aluminum grades used in the two processes are also different. China's national standard GB uses ZL to represent the cast aluminum grade, and YL represents the die cast aluminum grade. Usually cast aluminum castings can be heat-treated, generally T6 heat treatment, and die-casting parts because of the dense distribution of a large amount of gas inside, so it is not suitable for T6 heat treatment (because the temperature of T6 heat treatment is very high, lower than the melting point of aluminum alloy 15- At about 20 degrees, the gas in the die-casting part will expand and be forced out of the surface of the casting, which will cause the surface of the die-casting part to appear densely due to the gas-like point-like protrusions, and the appearance of the casting is seriously damaged and cannot be used).