Dynamic recrystallization kinetic model of 60Si2Mn steel

doi:10.13251/j.issn.0254-6051.2024.06.037

Abstract

Abstract: Dynamic recrystallization (DRX) behavior of 60Si2Mn spring steel at deformation temperature of 730-1000 ℃ and strain rate of 0.01-5 s^-1 was studied. The flow stress curves were obtained by processing the data of single-pass hot compression test of the tested steel. The dynamic recovery curves under different hot deformation conditions were fitted by the work hardening rate, and the dynamic recrystallization kinetic model was established. According to the model, the dynamic recrystallization volume fraction under different hot deformation parameters was predicted. The results show that the dynamic recrystallization behavior of the spring steel is sensitive to deformation temperature and strain rate. With the decrease of strain rate or the increase of deformation temperature, the critical strain of dynamic recrystallization softening decreases and the volume fraction of DRX increases. The predicted values are in good agreement with the experimental values, which verifies the applicability of the dynamic recrystallization kinetic model established for the spring steel.

Key words: 60Si2Mn spring steel, hot compression, dynamic recrystallization, kinetic model

CLC Number:

TG111.7

Cao Chenglong, Chen Qing'an, Huang Suxia, Shen Wenfei, Li Hezong, Cao Jingjing, Li Zihao. Dynamic recrystallization kinetic model of 60Si2Mn steel[J]. Heat Treatment of Metals, 2024, 49(6): 232-238.

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