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

Casting: the metal is melted into liquid, then poured into the mold, cooled, solidified and cleaned to obtain the casting with the required shape.

Second, the use is different:

Forging: used to process forgings of a certain shape and size.

Casting: usually used for blank forming, suitable for parts with complex shapes.