With the help of solidification kinetics, precipitation and growth of TiNhave been studied theoretically and the effect of cooling rate on the growth of TiN has beendiscussed. Through induction electric furnace experi...With the help of solidification kinetics, precipitation and growth of TiNhave been studied theoretically and the effect of cooling rate on the growth of TiN has beendiscussed. Through induction electric furnace experiment and electroslag remelting experiment withdifferent cooling rates, the distribution and particle size of TiN were investigated. It is provedthat the higher cooling rate is, the smaller the final size of TiN is and the more TiN particles canbe found in the steel. That TiN can restrain the growth of columnar crystal and enhance theproportion of equiaxed crystals to refine solidification structure as the heterogeneous nucleationsites of δ-ferrite is confirmed preliminarily. A new method to reduce macrosegregation incontinuous cast steel is provided.展开更多
基金This work was financially supported by the National Basic Research on New Generation Steel (973) (No.J1998061511-3)
文摘With the help of solidification kinetics, precipitation and growth of TiNhave been studied theoretically and the effect of cooling rate on the growth of TiN has beendiscussed. Through induction electric furnace experiment and electroslag remelting experiment withdifferent cooling rates, the distribution and particle size of TiN were investigated. It is provedthat the higher cooling rate is, the smaller the final size of TiN is and the more TiN particles canbe found in the steel. That TiN can restrain the growth of columnar crystal and enhance theproportion of equiaxed crystals to refine solidification structure as the heterogeneous nucleationsites of δ-ferrite is confirmed preliminarily. A new method to reduce macrosegregation incontinuous cast steel is provided.
