What is Hot Forging?

Hot forging can be defined as a metal shaping process in which a malleable metal part, known as a billet or work piece, is worked to a predetermined shape by one or more processes such as hammering, upsetting, pressing, and so forth where the work piece is heated up to about 75% of its melting temperature.

 Hot forging die is mainly used to bear the tension, pressure, bending, twisting and impact load of the key parts blank or part product production, the need for hot forging die variety, quantity. Here forging die is implemented efficiently low cost manufacturing again (see Figs. 7.27 and 7.28), compared with the traditional re manufacturing technology, material saving more than 50%, to improve the efficiency of re manufacturing by two to three times, the manufacturing cost will be reduced by more than 30%, the mold service life is increased by more than one time, obviously decrease the forging production cost, improve the overall profit and market competitiveness.

Iron and its alloys are almost always hot forged for two main reasons..

1. As the work hardens, hard materials (such as steel and iron) will be harder to machine, and
2. it is more economical to hot forge metals such as steel and then follow with heat treatment processes, since metals such as steel can be strengthened through other processes (and not necessarily just cold working processes).

While other materials must be strengthened by the forging process itself, materials such as most titanium and aluminum alloys can be hot forged and then hardened.