Forging is the term for metal forming using compressive forces. Cold forging is carried out at room temperature or at a temperature close to the room. Forging the extreme heat of high temperature is performed, which are easier deformed metal without reaching break (destroyed) by. Hot forging is carried out at temperatures between room temperature and high temperature forging. Forgings can be classified by their size from 2 cm up to 170 tonnes per meter. Forgings require further processing to obtain the finished part.
Forging is done in two ways: drop forging and hammer forging.
Metal products by forging is stronger than that obtained by casting or at the machined parts. This is due to the flow of grain from the forging. As the metal is pressed (hit), grains and seek shape of the deformed so that it retains continuity section. Some modern technology takes advantage of the high ratio between strength-task.
Many metals are forged, but iron and ferrous alloys are almost always forged to extreme heat. This for two reasons: if they are heat treated by quenching, hard materials like iron and steel would be
very difficult to process, the second steel can be hardened by means other than hot working, such as forging is more economical to heat treatment. Alloys which are suitable for the precipitation hardening, and most alloys of aluminum and titanium may also be forged rather than heat treated. Other materials to be hardened pirntr a proper forging process.