Finite element analysis of temperature field with phase transformation and non-linear surface heat-transfer coefficient during quenching

The calculation of temperature field has a great influence upon the analysis of thethermal stresses and strains during quenching, and also upon the residual stresses andmicrostructure of the workpiece after quenching, too. In this paper. a 42CrMo steelcylinder was taken as an investigating example. From the TTT diagram of the 42CrMo steel, the CCT diagram was simulated by mathematical transformation, and thevolume fraction of phase constituents was calculated. The thermal physical propertieswere treated as the functions of temperature and the volume fraction of phaseconstitutents. Finally, the temperature field with phase transformation and non-linearsurface heat-transfer coefficients was calculated with finite element method. and thecorresponding functional of temperature was established.