According to the production tool, forging technology can be divided into free forging, module forging, ring rolling and special forging.

Free forging: a forging process in which a blank is deformed to obtain the desired geometry and internal mass by applying a direct external force to the blank with a simple universal tool or between the upper and lower anvil iron of the forging equipment.

Die forging: forging obtained by deformation of blank metal under pressure in the bore of a forging die with a certain shape. Die forging can be divided into hot die forging, warm forging and cold forging. Warm forging and cold forging are the future development direction of die forging, and also represent the level of forging technology.

Ring grinding: refers to the production of ring parts with different diameters by special equipment ring grinding machine, also used for the production of automobile wheel hub, train wheel and other wheel-shaped parts.

Special forging: including roll forging, wedge rolling, radial forging, liquid forging and other forging methods, these methods are more suitable for the production of some special shape parts. For example, roll forging can be used as an effective pre-forming process to greatly reduce the subsequent forming pressure; Wedge rolling can produce steel ball, drive shaft and other parts; Radial forging can produce large barrel, step shaft and other forgings.

According to forging temperature, forging technology can be divided into hot forging, warm forging and cold forging.

The initial recrystallization temperature of steel is about 727℃, but 800℃ is generally used as the dividing line. Forging at 300 ~ 800℃ is called warm forging or semi-hot forging, forging at room temperature is called cold forging. Used in most industries forging is hot forging, warm forging and cold forging mainly used in the forging of automotive, general machinery and other parts, warm forging and cold forging can effectively save material.

According to the movement of forging die, forging can be divided into swing rolling, swing forging, roll forging, wedge rolling, ring rolling and cross rolling.