HI, Can you tell me the iso thermal annealing cycle for material EN355 forgings so as to get pearlitic structure with hardness in the range 170 -200 bhn. Provide the austinising temperature , soaking cycle , followed by cooling time and temprature.
I don't know your answers, but I do know it will NOT be isothermal. Isothermal means at a constant temperature, and there are at least three different temperatures involved.
Did you mean ISO, as in International Standards Organization, or something similar?
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Iso thermal annealing is a heat treatment process which means after austinizing the material is cooled down at a specific rate to a particular temperature to give pearlitic structure , it is maintianed for certain period of time and then finally cooled down to room temperature.
Unfortunately I don´t have the CCT or TTT diagrams for that steel. I've found some sources to get it but aren't free (a little cost).
Once you have the diagram, you just have to heat the material to the austenizing temperature indicated and follow a cooling cycle that cross the "S" curves at the upper right zone (pearlitic transformation).
Kind regards
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Iso Thermal Annealing
Re: Iso Thermal Annealing
