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Advantages and Disadvantages of Metal Casting

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Advantages and Disadvantages of Metal Casting

Release date:2019-09-19 10:01 source:Original click:

 Compared with sand casting, metal casting has many advantages in technology and economy.

  (1) The mechanical properties of metal casting are higher than that of sand casting. Similarly, the average tensile strength and yield strength of the alloy can be increased by about 25% and 20% respectively. The corrosion resistance and hardness of the alloy are also significantly improved.

  (2) The accuracy and surface finish of castings are higher than those of sand castings, and the quality and size of castings are stable.

  (3) The process yield of castings is high and the consumption of liquid metals is reduced, which can generally save 15-30%.

  (4) Shaping materials can be saved by 80-100% without sand or less sand.

  In addition, the production efficiency of metal mold casting is high, the causes of casting defects are reduced, the process is simple, and it is easy to realize mechanization and automation. Although metal mould casting has many advantages, it also has some disadvantages. Such as:

  (1) High manufacturing cost of metal moulds;

  (2) Metal moulds are impermeable and non-yielding, which can easily cause defects such as insufficient casting, cracking or white cast iron.

  (3) In metal mould casting, the working temperature of the mould, the pouring temperature and the pouring speed of the alloy, the residence time of the casting in the mould and the coating used are very sensitive to the quality of the casting and need to be strictly controlled.

  Therefore, when deciding to adopt metal mould casting, the following factors must be considered comprehensively: the shape and weight of castings must be appropriate; enough batches should be required; and the time limit for completing production tasks should be allowed.

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