Transactions of Materials and Heat Treatment

Title：Analysis on subdynamic recrystallization and establishment of mathematic model for nonquenched and tempered steel

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ClassificationCode：TG441.8

year,vol(issue):pagenumber：2021,46(1):175-178

Abstract：

According to the eighteen sets of thermal simulation tests and design of different process parameters, the stress-strain curve of TL1438 non-quenched and tempered steel was obtained after sub-dynamic recrystallization, and the influences of strain, strain temperature, strain rate and holding time after two times of compression on the process were compared. Combined with the calculation of related theoretical formulas, the grain size and kinetic model after two times of compression were obtained by the method of mutual reference between theory and test. The results show that as the strain temperature increases, the sub-dynamic recrystallization is easier to produce, and the generation speed is faster. But the effect of strain rate is reversed, and the effect of holding time after two times of compression is more obvious. Therefore, through physical experiments and microstructure research, the purpose of predicting the evolution law of non-quenched and tempered steel structure and optimizing process parameters is achieved, which provides a reference for the future analysis on the comprehensive mechanical properties and numerical simulation of this kind of this kind of forgings.

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基金项目:上海工程技术大学实践教学建设项目（x202024001）

作者简介：梁孟强（1989-），男，硕士，实验师 E-mail：lmq158965@sina.com

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