Cryogenic Treatment
Source: Delstar Corporation
Cryogenic treatment, or cryo treatment, is a subsequent process to conventional heat treating
Delstar Corporationnic treatment, or cryo treatment, is a subsequent process to conventional heat treating. Heat treating typically occurs prior to the machining of a tool or part. During cryo treatment, metals are placed in a dry processing chamber and:
- Subjected to a process of precisely controlled, slow cooling to –320°F (-195°C)
- Held at that temperature for a period of 24 to 48 hours (depending on the type of metal)
- Subjected to a precisely controlled, slow warming to room temperature
- Cycled three times through a controlled exposure to heat [elevated from room temperature to +300°F (+150°C) or greater, held for an hour or so, and cooled to room temperature
Cryo treatment increases wear resistance, improves dimensional stability and prolongs metal life by reducing residual stress in the metal; improving the dimensional stability of the metal; producing filler particles that refine and close grain structure in the metal. The process effects a permanent, irreversible change throughout the metal structure. Subsequent finishing, regrinding, or sharpening do not negate the improved properties of the metal.
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