The kinetics of phase transformations during tempering in structural steels with nickel

The kinetics of phase transformations during continuous heating (tempering) from quenched state by means of the CHT (continuous heating transformation) diagrams was presented. On these diagrams ranges of temperatures of ɛ carbide and cementite precipitation and retained austenite transformation were marked. The effect of chemical composition and cooling rate on ranges of temperatures these transformations were determined. For investigation four model alloys of the variable concentration of Ni and constant concentration of carbon and other elements were used.