Transactions of Materials and Heat Treatment

Title：Research on microstructure evolvement simulation during hot-upsetting

Authors： GU Yong

Unit： Hangzhou Normal University

KeyWords： hot-upsetting analysis model microstructure simulation

ClassificationCode：TG316；TB115

year,vol(issue):pagenumber：2010,35(4):137-141

Abstract：

Based on the study of the related theory of FEM and the model of recrystallization, a program for microstructure simulation was developed with Fortran, which not only could simulate the recrystallization during hot-upsetting, but also could calculate the average grain size.The results of numerical simulation chime with existing experimental results. The results show that during hot-upsetting process, the area near the interface between work-piece and dies is difficult to be deformed and the microstructure and quality is not improved and there is hardly no recrystallization. While deformation of the area near core and diagonal is large enough for adequate dynamic recrystallization to be happened, which produces fine grains so that the microstructure can be improved greatly.

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Reference：

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