Sub Zero (Cryogenic) Treatments
Sometimes known as Sub-Zero Treatment or Metal Freezing. This involves freezing components down to temperatures as low as -100°C. There can be a variety of reasons to carry out this treatment as below:-
- As part of the tempering process, to ensure that full transformation to an ideal microstructure has occurred.
- For components that will be experiencing low temperatures in service.
- To increase theabrasive wear resistance of certain tool steels.
- The process is also used to aid shrink fitting of components when heating of the outer component is restricted.
Cryogenic treatment is commonly specified as part of the heat treatment process cycle for critical components in aerospace, medical, motorsport and other highly stressed applications.