In order to establish ferrite phase transformation kinetics mathematical model of DP600 hot rolled dual-phase steel under the ESP process condition,the isothermal phase transformation and continuous cooling phase transformation experiments were conducted on the experimental steel by using the dynamic phase transformation dilatometer.Based on the measured ferrite phase transformation incubation time and ferrite volume fraction,the incubation time of ferrite phase transformation was calculated by combining classical nucleation theory above the deformation temperature,and the incubation time of ferrite phase transformation below the deformation temperature was calculated by fitting ∆GV according to the experimental data.Considering the influence of cooling rate,the additivity rule was modified and based on this,the starting temperature and volume fraction of ferrite phase transformation under continuous cooling conditions were calculated.The results showed that the calculated starting temperature and volume fraction of ferrite phase transformation using the modified phase transformation model are in good agreement with the measured values,which can be used to predict the ferrite phase transformation behavior of DP600 dual-phase steel under the ESP process.
NETL
NSTL
万方数据
