Effect of Phase Transformation and Latent Heat on Hot Rolling Deformation Behavior of Non-oriented Electrical Steel

摘要

In order to make up for the deficiency of the traditional austenite deformation resistance model and the existing rolling theory in the gage and shape control of hot rolled non-oriented electrical steel, the mathematical models related to phase transformation are established by regression analysis and then written to be ABAQUS subroutines, which are subsequently embedded into the heat transfer model and rolls-strip coupling model. The finite element models are used to accurately predict the transverse distribution of the temperature field and phase field, and analyze the effect of phase transformation and latent heat on the total roll force, distribution of per unit roll force and roll gap profile. The transverse transformation difference is induced by the temperature difference along strip width direction. The latent heat contributes to the uniformity of temperature field and phase field. The total roll force and center gage are reduced due to the phase transformation, but the adjustment of roll force on the crown is enhanced and the rolling pressure spikes are eliminated due to the appearance of ferrite phase in the edge of strip. The roll force distribution and roll gap profile are weakly dependent on the latent heat, but primarily influenced by the transformation.