Are the pieces deformed or does their appearance change after the process?
No. The multi-stage cryogenic treatment does not alter the dimensions of materials. On the contrary, components treated usually gain in service dimensional stability. The appearance is not altered either and no corrosion is produced as the process is performed in an inert (nitrogen) atmosphere. Therefore, the treatment is undetectable in practice. Only in the case of certain steels which after hardening still contain a high percentage of remaining austenite could there be a minimum growth in the material due to the fact that the volume of the martensite crystal is slightly larger than the austenite crystal. In any case, it would be an imperceptible alteration in most applications which, if necessary, could be corrected in most cases (see previous questions).
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