TiN particle growth model in molten steel with electropulsing
Ti microalloyed steel often produces thick TiN precipitates in the continuous casting process,which leads to nozzle clogging and other problems,and the electropulsing will affect the size of TiN particles.A kinetic model of TiN particle growth in static molten steel with electropulsing was established.The model was modified by experi-mental data,and based on the model,the effects of current intensity and cooling rate on TiN particle size in steel were discussed.The results show that the size of TiN particle in molten steel decreases with the increase of current at the same temperature.When the current is the same,the TiN particle size decreases gradually with the cooling process,and the longer the cooling time,the smaller the TiN particle size.The growth of TiN particles in steel can be effectively inhibited by electropulsing,and the inhibitory effect is better with higher current intensity and longer electrification time.The calculated results of the model are basically consistent with the experimental data,which verifies the validity of the model.The results provide a theoretical basis for controlling the size of TiN precipitates in steel by electropulsing.
electropulsingmicroalloyed steelparticle sizeTiNkinetic model
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