Casting is to melt the raw material and let it form naturally in the molding mold. Molten liquid metal fills the cavity and cools, it is easy to produce air holes in the middle of the parts. There are two kinds of casting: high pressure casting and low pressure casting. Simply put, when you melt the metal, the pressure on the model is different, and the temperature at which the metal is heated is different from the machine used to cast it.
Free forging is a kind of processing method which puts the heated metal blank on the forging equipment and between the iron in the lower part, and applies impact force or pressure to directly make the blank produce plastic deformation, so as to obtain the forging required. Free forging is suitable for the production of single piece, small batch and heavy forgings due to its simple shape and flexible operation.
Casting or other workpiece, through percussion or other pressure impact to obtain better strength of the process. In this way, the performance and strength of the products are stronger than casting. For example, hammering is a traditional forging process. Forging is generally the re-processing of castings or bars, often seen in automobiles and valves. Simple in appearance, bulky in size.
