Change of solidification parameters of GH4169 alloy during electroslag remelting process was simulated by the MeltFlow software

and effects of frequency variation on the parameters were analyzed.It is shown that solidification process parameters are decreased gradually with the increase of the frequency

and it is changed sharply with frequency lower than 40 Hz

and it is changed gently with frequency more than 40 Hz.Solidification process parameters are decreased gradually with the increase of the cooling rate from center to edge of remelting ingot.Trends of local solidification time

secondary dendrite arm spacing and Rayleigh number are consistent

and these parameters are equivalent in judging solidification structure

futhermore

the solidification structure is independent of these parameters with the frequency more than 40 Hz.The solidification process parameters in the power frequency are superior to those in lower frequency.Simulation results are well agreement with experimental ones

which shows that the simulation can predict the generation and level of defects in different processes to optimize technology and improve the ingot quality.