The process that’s involved in forging seamless rings produces components that feature toughness, strength, as well as fatigue resistance through its contoured grain flow. If you’re not familiar with this process, it starts with the starting stock of the desired material that’s being cut to size before they’re being rounded on open die presses. Once the rounded piece is produced, it’s upset and pierced in order to create a doughnut-shaped preform that’s ready to be placed on the rolling mill where the ring’s diameter is increased, and its height and thickness are decreased until the desired output is achieved.
Cast rings are vulnerable to cracks and fractures because of their lack of grain structure which significantly affects the rings’ ductility, toughness, and fatigue strength. On the other hand, the forging process features controlled directional grain flow – the result of which are seamless rings that’s superior in terms of structural integrity and highly resistant to inclusions and porosity.
The chances of producing a distorted ring shape that has a jeopardized corrosion resistance and reduced part integrity are extremely high with extensive welding. Forged seamless rolled rings will not have these issues because of the absence of welding. You can expect to produce stronger rings with fewer chances of exhibiting part fatigue and breakage.
A ring that’s produced through hot rolled plates has exposed grain ends when the ring shape is cut. This is due to the grain flow that’s inherently unidirectional in a hot rolled plate. This results in a ring that’s more vulnerable to fatigue and stress corrosion cracking. With the forging process, the target ring size is achieved because of controlled directional flow while minimizing waste.
If your next project requires the use of seamless rings, get in touch with Ferralloy, Inc. We supply rolled ring forgings in diameters up to 110” from carbon, alloy, and stainless steel. Call us today.
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