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In the forging process, metal is shaped by pressing, pounding, or squeezing under very high pressure to form parts called forgings.  Almost any metal can be forged, including carbon, alloy and stainless steel, aluminum, titanium, brass, copper, and others.  The metal is preheated prior to the forging services process, but not melted, as in the casting process.  There are several different types of forging processes, including cold forging or heading, impression die (closed die) forging, open die forging, and seamless rolled ring forging.  The types of forging services selected are determined by the shape, size and material of the metal to be forged and the end product. In cold forging, the metal being processed is not directly heated.  Instead, it is molded under extreme pressure.  This process makes products that are precisely sized to final shape. It is often used to create small components like fasteners. While the forces required to mold the metals are extreme, the overall energy needed to forge items using this process is rather small, as no heating is required.  Items prepared through this process are generally strong, as heating has not weakened the strength and consistency of the metal.

Impression die forging is the most commonly used of the forging services.  In impression die forging, a metal workpiece is placed between two dies.  As the dies are brought closer together, the workpiece undergoes plastic deformation until its enlarged sides touch the die sidewalls.  During the process, flash is formed, as some of the molten metal from the workpiece flows outside the die impression.  As the flash cools, it imparts deformation resistance to the workpiece, strengthening the final product.  This builds pressure inside the bulk of the workpiece, aiding material flow into unfilled impressions.

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Other Topics You Might Be Interested In
Cold Forging
Cold forging, also known as cold heading, is a variation of impression die forging and may include processes such as bending, cold drawing, cold heading, coining, extrusions, punching, thread rolling,... (Read More)
Impression Die Forging
In the impression die forging process, a press or hammer is used to pound or press metal into the desired shape. The hydraulic presses, mechanical presses and hammers used in this process have... (Read More)
Alloy Chemistry Charts
The following charts provide Chemical Compositions for the most commonly forged grades of carbon, alloy, tool and stainless steel, as well as nickel and copper alloys. All are available from Scot... (Read More)

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