What are the factors that should be considered while selecting a deep cycle cryogenic treatment for steels?
Write me the selected steel you want to do cryotreatment so that I can give you specific answer.
Hi Veerendra,
One of the key aspects before designing a cryogenic processing cycle is the steel composition, specially the carbon content and the addition of gammagenic elements (chromium, nickel, manganese, etc).
I don't know what kind of steel you are working with, but generally, LN is used as coolant agent (-196 °C), you could use that temperature as a starting point for your cycles, as every alloy has a different response.
I strongly recommend you to check professor's Das articles, in them you are going to find plenty of information and useful references.
Regards!
The CCT and TTT diagrams define the transformations of alloy steel for Austenite start, stop and Martensite start. Is there any procedure to determine martensite stop temperature at subzero level.
In cryogenic treatment, you should cool your samples to the lowest possible temperature available to you (preferably, 77K) and try to keep the sample at that temperature for say, 36 h. Rates of cooling and heating are crucial, keep these rate as low as possible.
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