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Welders use cryogenics to extend to extend the life of their nozzles and tips. For more examples of industries benefiting from cryogenics, visit the Applications page. |
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A brief history... Scientists have been experimenting with the use of extreme cold to strengthen metal since the mid-1800s, but it wasn't until the advent of space travel that cryogenic processing really came into its own. NASA engineers analyzed spacecraft that had returned from the cold vacuum of space, and discovered that many of the metal parts came back stronger than they were before spending time in space. Today, cryogenics is an essential part of NASA's space strategy. A description of the treatment process No, we don't send your items to the moon! We place them in a processor where they are gradually cooled with nitrogen gas to -300 degrees Fahrenheit. That temperature is maintained for at least eight hours. The length of time varies by material and desired results. After the cooling cycle is complete, the item is slowly warmed back to room temperature. Then the object is heat-treated, with temperatures of 100 to 400 degrees Fahrenheit, depending on the composition of the item. Finally, the item is gradually returned to room temperature. The complete process takes a minimum of 24 hours. What is actually happening to the object? This one-time process tightens grain structure creating a denser microstructure while increasing surface area. This improves the path of energy and provides increased stress relief and dimensional stability. The bottom line — components last longer and perform better.
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