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FORGING & CNC MACHINING

Forging is a manufacturing process where the metal is hammered, pressed or rolled under high, localized pressure and shaped into high strength parts.
Forging process can ensure the continuity of metal fiber structure, keep the fiber structure of forging consistent with the shape of forging, complete metal streamline, compact structure and good mechanical properties.
The forged products have high hardness, hard and wear-resistant, good texture and corrosion resistance, which can ensure good mechanical properties and long service life of the products.

Hot Die Forging Vs Cold Die Forging

Most metal forging operations are carried out hot, due to the need to produce large amounts of plastic deformation in the part, and the advantage of an increased ductility and reduced strength of the work material. Hot die forging also eliminates the problem of strain hardening the metal.

In cases where it is desirable to create a favorable strain hardening of the part, cold die forging may be employed. Cold die forging manufacture while requiring higher forces, will also produce a greater surface finish and dimensional accuracy than hot die forging.
 

Hot Forging

Hot forging requires the metal to be heated above its recrystallization temperature. This can mean heating metals up to 2,300 degrees Fahrenheit. The main benefit of hot forging is the decrease in energy required to form the metal properly. This is because excessive heat decreases yield strength and improves ductility. Hot forged products also benefit from the elimination of chemical inconsistencies.

Cold Forging

Cold forging typically refers to forging a metal at room temperature, though any temperature below recrystallization is possible. Many metals, such as steel high in carbon, are simply too strong for cold forging. Despite this hindrance, cold forging does edge out its warmer equivalent when it comes to standards of dimensional control, product uniformity, surface finish, and contamination. Cold forging encompasses numerous forging techniques, including bending, extruding, cold drawing, and cold heading. However, this increased versatility comes at a cost, because cold forging requires more powerful equipment and may call for the use of intermediate anneals.

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