What is the difference between forging and casting ?

The difference between forging and casting:

Forging:  Using hammering and other methods, the metal material in the plastic state is transformed into a workpiece with a certain shape and size, and its physical properties are changed. 

Casting: A processing method is to melt the metal into a liquid and pour it into the mold, cool, solidify, and clean to obtain the required shape of the casting. It can be made into a variety of complex objects. 

The production process is different. 

Forging: It is a processing method that uses a forging machine to apply pressure on the metal blank to cause plastic deformation to obtain a forging with certain mechanical properties, a certain shape and size. It is one of the two main components of forging ( forging and stamping ). 

Casting: It is a method of casting liquid metal into a casting cavity suitable for the shape of the part. After cooling and solidification, the part or blank is obtained.

Advantages of casting: 

1. Can produce parts with complex shapes, especially blanks with complex inner cavities. 

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

3. Raw materials have a wide range of sources and low prices.

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

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