Stainless Steel Forgings
Forging is a manufacturing process where metal is pressed, pounded or squeezed under great pressure to produce high-strength parts. Forged stainless steel is ideal for applications where perfermance of corrosion resistance and safety are critical. The forged stainless steel 904L flanges on pharmaceutical machinery are a perfect example. There are primarily three types of forging processes: open-die forging, ideal for larger stainless steel components; closed-die forging, well-suited for more intricate designs and tighter tolerances; and ring-rolled forging used to create high-strength ring-shaped applications.
●High performance and strength
The forging process is used in applications where performance and strength are critical requirements.
Forged components are commonly found at points of stress and shock. Pistons, gears and wheel spindles in high performance automobiles and aircraft are often made from forged stainless steel.
●Tools of the trade
Hammers, presses and upsetters are the basic types of equipment used in the forging process. Hammers can apply a driving force of up to 50,000 pounds where presses can exert a force of up to 50,000 tons. Upsetters are basically a press used horizontally to increases the diameter of a work piece by compressing its length.
●Mark of quality
"Forged" is the mark of quality in hand tools and hardware. Pliers, hammers, wrenches, garden implements and surgical tools are almost always produced through forging.
Stainless Steel Forging Processes
Ideal for processing large pieces of stainless steel, open die presses do not constrain the steel billet during the forging process and utilize flat dies free of precut profiles and designs.
Closed-die forging, also known as impression-die forging, can produce an almost limitless variety of shapes that range in weight from mere ounces to more than 500kg. As the name implies, two or more dies containing impressions are brought together as forging stock undergoes plastic deformation. Because the dies restrict metal flow, this process can yield more complex shapes and closer tolerances than open-die forging. Impression-die forging accounts for the majority of stainless steel forging production.
When industrial applications call for a high strength, circular cross section component, there is no match for rolled-ring forging. The process typically begins with an open-die forging to create a ring preform, shaped like a doughnut. Next, several rollers apply pressure on the preform until the desired wall thickness and height are achieved. Configurations can be flat, like a washer or feature heights of more than 20 inches. Rings can be rolled into numerous sizes, ranging from roller-bearing sleeves to large pressure vessels.
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