Transactions of Materials and Heat Treatment

Title：Dynamic recrystallization behavior for 10 steel during thermal deformation process

Authors： Li Chaoqun Zhang Liwen Li Fei Zhang Chi Mao Peigang

Unit： Dalian University of Technology

KeyWords： 10 steel dynamic recrystallization critical strain kinetics model grain size model

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2022,47(2):207-212

Abstract：

For 10 steel, a single-pass compression test was carried out on the thermal simulator Gleeble-1500，and the size of sample was Φ10 mm×15 mm. The compression deformation temperatures were 900-1200 ℃, the strain rates were 0.01-10 s-1, and the compression amount was 63.2% (the true strain was 1.0). The results show that the stress of 10 steel decreases with the increasing of deformation temperature and increases with the increasing of strain rate during the high-temperature single-pass compression test，and the dynamic recrystallization phenomenon occurres during the thermal deformation of 10 steel. On the basis of this research, the critical strain model of dynamic recrystallization for 10 steel was obtained, according to the true stress-true strain curves，the dynamic recrystallization volume fractions were calculated, and the recrystallization kinetic model of 10 steel was constructed. Furthermore, the dynamic recrystallization grain size model of 10 steel was established，according to the grain sizes measured by the metallographic photos. The average absolute relative error (AARE) was introduced to verify the fitting effect of dynamic recrystallization grain size equation for 10 steel, and the value of AARE was 6.32%, indicating that the fitting effect was good.

Funds：

国家重点研发计划（2019YFA0705304）；辽宁省自然科学基金资助项目（2019KF0506）

作者简介：李超群（1996-），男，硕士研究生，E-mail：992742661@qq.com；通信作者：张立文（1962-），男，博士，教授，E-mail：commat@mail.dlut.edu.cn

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