Advantages and disadvantages of forging and casting

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2020-11-03


 1. The difference between forging and casting:

  The difference between forging and casting, for example: their meanings are different, and their production processes are different. The following mainly introduces the relevant characteristics of forging and casting in detail.

  words have different meanings:

  Forging: Use hammering and other methods to make a metal material in a plastic state into a workpiece with a certain shape and size, and change its physical properties.

  Casting: The processing method of melting the metal into a liquid and then pouring it into a mold, cooling and solidifying and cleaning to obtain a casting of the desired shape. Various objects with complex shapes can be made.

  2. The production process is different:

  Forging: is a processing method that uses forging machinery to apply pressure to metal blanks to produce plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. Forging (forging and stamping) is one of the two major components.

  Casting: It is a method of casting liquid metal into a casting cavity suitable for the shape of the part, and after it has cooled and solidified, the part or blank is obtained.

  2. The advantages and disadvantages of forging and casting:

  Forging advantages:

  Through forging, it is possible to eliminate defects such as porosity of as-cast metal during the smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than those of the same material. For the important parts of related machinery with high load and severe working conditions, forgings are mostly used except for simpler shapes that can be rolled, profiles or welded parts.

  casting advantages:

  1. It can produce parts with complex shapes, especially blanks with complex cavities.

  2. Wide adaptability, metal materials commonly used in industry can be cast, from a few grams to hundreds of tons.

  3. The source of raw materials is wide, and the price is low, such as scrap steel, scrap, cutting chips, etc.

  4. The shape and size of the casting is very close to that of the part, which reduces the amount of cutting and belongs to non-cutting processing.

  5. It is widely used. 40%~70% of agricultural machinery and 70%~80% of machine tools are castings.

  Forging disadvantages:

  In the forging production, it is prone to traumatic accidents.

  casting disadvantages:

  1. The mechanical properties are not as good as forgings, such as coarse structure and many defects.

  2. In sand casting, single-piece, small batch production, labor intensity of workers.

  3. The quality of castings is unstable, there are many processes, and the influencing factors are complicated, and many defects are easy to produce.

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