Abstract

Abstract: Cryogenic is the study of production of behavior of material at very low temperature ranging from -80 C to -196 C.Here different cryogenics such as CO2, LN2, He, O2 etc. After a waiting period the samples are again gradually brought toroom temperature. Extensive use of this cryogenic treatment method is applied to a different material used in a various fieldof application as it is cheaper and easier to apply as compared to other treatments mostly emphasizes the tool performance.Cryogenic cooling with LN2 is recognized as a green solution for effective changes of hardness and micro-structural analysisand result in it may replacement of hardening process of hot working at material in to days manufacturing sectors.Our project focus deep cryogenic cooling of AISI 52100 bearing steel. In order to study material behavior at low cryogenictemperature in comparison with convectional cold working process. Result has to obtain in terms of surface roughness andmicro structural analysis. Different cooling time is provided Dewar of LN2. And respective hardness is measured andcompared and after measuring and comparison of hardness, the kind of result get it is observed that hardness of material isincreasing as the time interval of deep cooling is increased.