Forging of aluminum alloys

Forging of aluminum alloys

Forging: is a processing method that uses forging machinery to apply pressure to a metal blank to produce plastic deformation in order to obtain forgings with certain mechanical properties, certain shapes and sizes.

One of the two main components of forging. Through forging can eliminate the cast metal looseness, welding together holes, forging mechanical properties are generally better than the same material castings. Machinery in the high load, severe working conditions of important parts, in addition to the simpler shape of the available rolled plate, profile or welded parts, more forgings.

Forging according to the forming method can be divided into: ① open forging (free forging). The use of impact or pressure to make metal in the upper and lower two against the iron (anvil block) between the deformation to obtain the required forgings, mainly manual forging and mechanical forging two. ② Closed mode forging. Metal billet in a certain shape of forging die chamber pressure deformation and obtain forgings, can be divided into die forging, cold heading, rotary forging, extrusion, etc.. Forging by deformation temperature can be divided into hot forging (processing temperature higher than the recrystallization temperature of the billet metal), warm forging (lower than the recrystallization temperature) and cold forging (room temperature).

Forging materials are mainly carbon and alloy steels of various compositions, followed by aluminium, magnesium, titanium, copper and their alloys. The original state of the material is bar, ingot, metal powder and liquid metal. The ratio of the cross-sectional area of the metal before deformation to the die cross-sectional area after deformation is called the forging ratio. The correct choice of forging ratio is very relevant to improving product quality and reducing costs.