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Cryogenic Treatment

Equipment description outline

Principle:	Generally this process uses liquid CO2, solid CO2, Freon, or liquid nitrogen as a cooling agent. The treatment temperature is between -70℃ and -150℃. This process can turn the retained Austenite after quenching into Martensite.
Method:	Using liquid nitrogen as a cold agent to proceed with cryogenic treatment that is after quenching and before tempering.
Types of cryogeny:	˙General cryogeny -60℃～-90℃ ˙Super cryogeny -130℃～-160℃
Effects:	1. Structure stability, size stability 2. Uniformization and improvement of the hardness of quenching steel 3. Prevention of early shape change 4. Improvement of ware resistance 5. Expansion fit

Effect comparison

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