The effects of the deformation parameters in the heavy reduction(HR)process on recrystallization kinetics and microstructure evolution were analyzed.Based on the experimental results,metadynamic recrystallization(MDRX...The effects of the deformation parameters in the heavy reduction(HR)process on recrystallization kinetics and microstructure evolution were analyzed.Based on the experimental results,metadynamic recrystallization(MDRX)kinetic and austenite grain size models were established for a continuously cast slab during HR.Moreover,the evolution of the quenched microstructure after MDRX was observed using electron backscatter diffraction.The relative frequency of very low-angle grain boundaries decreased from 58.8% to 52.1%,and the relative frequency of high-angle grain boundaries increased from 28.5% to 38.9%.Analyses revealed that the recovery was the main softening mechanism.The decrease in the total grain boundary length indicated that subgrain growth occurred with increasing inter-pass time.The main texture evolved from a {001}<110>texture to a{112}<111>texture,and the texture strength remained unchanged.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51974078,U1708259,and U20A20272)Liaoning Revitalization Talents Program(Nos.XLYC1802032 and XLYC1907176)+1 种基金the Fundamental Research Funds for the Central Universities of China(Nos.N2025012,N2125018,and N2125007)the Fourth Period Science and Technology Key Project of Panxi Experimental Area(No.PGWX2018-05).
文摘The effects of the deformation parameters in the heavy reduction(HR)process on recrystallization kinetics and microstructure evolution were analyzed.Based on the experimental results,metadynamic recrystallization(MDRX)kinetic and austenite grain size models were established for a continuously cast slab during HR.Moreover,the evolution of the quenched microstructure after MDRX was observed using electron backscatter diffraction.The relative frequency of very low-angle grain boundaries decreased from 58.8% to 52.1%,and the relative frequency of high-angle grain boundaries increased from 28.5% to 38.9%.Analyses revealed that the recovery was the main softening mechanism.The decrease in the total grain boundary length indicated that subgrain growth occurred with increasing inter-pass time.The main texture evolved from a {001}<110>texture to a{112}<111>texture,and the texture strength remained unchanged.
