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Why use Cryogenic Treatment?
Nitrofreeze provides Cryogenic Treatment Services to customers who want to enhance the overall performance of their metal components. Cryogenic Treatment, which is also known as Cryogenic Processing, modifies the micro-structure of metals by subjecting them to ultra-cold temperatures (down to –300ºF). Cryogenic Treatment as a whole, promotes three transformations in heat-treated steels, cast irons and other metals:
Increase Durability: More Consistent Grain Structure
All steels need to be heat treated after being forged or cast. Heat treating is used to obtain desired characteristics in the steel including the conversion of the “unwanted” austenite crystal structure to the more desirable crystal structure called martensite. While it is near impossible to get a 100% martensitic crystal structure, all steels have a certain allowable percentage of “retained austenite” or “RA” that is not converted to martensite. It is widely accepted in the heat-treating industry that all heat-treated steels will have some percentage of RA after heat treatment, recipes routinely specify an RA will “not exceed” a certain percentage. Cryogenic Treatment can help promote the additional transformation of retained austenite into martensite. Utilizing Cryogenic Treatment helps to further eliminate voids or imperfections in the steel’s microstructure. This is widely accepted and well-documented fact that is evident in X-Ray and SEM (scanning electron microscope) analysis of steels before and after Cryogenic Treatment.