Over the years, the forging industry has tremendously evolved. The use of various techniques and processes gave rise to applications in industries such as construction, agricultural, automotive, machinery, and so much more. Furthermore, the two most popular forms of forging are open die forging and closed die forging. Although both are rooted in the fundamental forging process that involves beating a piece of metal until the desired shape, strength, and granular level are achieved, these two processes have branches in different directions.
Sometimes called free forging, the open die forging process involves the placement of a piece of metal between multiple dies that don’t entirely close the metal. Through a series of movements, the dies hammer and stamp the material to change its dimensions until the required shape is attained.
Closed die forging is also called impression forging. It uses pressure to compress a piece of metal so that it will fill an enclosed die impression. It also involves the use of a medium frequency induction heating furnace for applying heat to the metal until the desired shape is achieved.
The end products of both processes look different from each other in terms of size. The forging process alters the metal at a granular level as continuous force is being applied via the beating process. Since open die forging doesn’t involve a fixed die size, this method works best for creating larger and heavier metal components that don’t require much machining to produce ultra-finished products. Among these large components are rollers and shafts that are used in railways. On the other hand, closed die forging is ideal for applications that require a high degree of precision such as forged fittings or automotive parts.
If you need more information about open and closed die forgings, contact Ferralloy, Inc. today. We’re the leading global supplier of engineered products and services to a diverse metalworking customer base.
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