MATHEMATICAL SIMULATION of the TEMPERATURE AND PHASE-STRUCTURAL states at SURFACING THE BIMETALLIC MILL ROLL
In this paper, a mathematical model able to describe the temperature field and distribution of the phase and structural composition in the bimetallic roll during the entire surfacing process has being designed. Nonlinear nonstationary heat conduction problem was resolved on the basis of the finite element method. Boundary conditions of the third kind were used for heat transfer description. Modeling the austenite-to-pearlite transformation under isothermal conditions carried out on the basis of Avraami equation. The transition from isothermal kinetics of austenite to nonisothermal conditions was realized with the theory of isokinetic reactions using the additive rule. The results of calculations for temperatures and structures in a bimetallic cold roll for various surfacing stages are given. The developed software can be useful for the numerical analysis of the roll stress-strain state during surfacing.