Effect of Zr on Dynamic Recrystallization Behavior of Ti‐Microalloyed Low Carbon Steels,Steel Research International

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Effect of Zr on Dynamic Recrystallization Behavior of Ti‐Microalloyed Low Carbon Steels
Steel Research International ( IF 1.9 ) Pub Date : 2020-07-30 , DOI: 10.1002/srin.202000104
Min Zeng ₁ , Jian-Chun Cao ₁

Affiliation

The dynamic recrystallization (DRX) behavior of Ti‐ and Ti–Zr‐microalloyed steels are systematically investigated on a Gleeble‐3800 thermomechanical simulator at the deformation temperatures from 900 to 1100 °C and strain rates from 0.001 to 10 s⁻¹. The hot deformation activation energies of the two tested steels are obtained by regression method, and the hot working equations are also established. From the strain hardening rate and stress curve, the critical strains are obtained, and the recrystallization volume fraction model is established. The results show that DRX occurred in both tested steels at high temperature and low strain rate. The activation energy of Ti‐microalloyed steel increased 56.6 kJ mol⁻¹ by adding Zr. When the strain rate is low, the flow stress and critical strains for Ti–Zr‐microalloyed steel are higher than that of Ti‐microalloyed steel.

中文翻译：

Zr对Ti微合金低碳钢动态再结晶行为的影响

在Gleeble-3800热机械模拟器上，在900至1100°C的变形温度和0.001至10 s ^-1的应变速率下，系统地研究了Ti和Ti-Zr微合金钢的动态重结晶（DRX）行为。通过回归法获得了两种被测钢的热变形活化能，并建立了热加工方程。根据应变硬化率和应力曲线，得出临界应变，并建立了再结晶体积分数模型。结果表明，两种被测钢在高温和低应变率下都发生了DRX。钛微合金钢的活化能增加了56.6 kJ mol ^-1通过添加Zr。当应变率低时，Ti-Zr微合金钢的流动应力和临界应变高于Ti-微合金钢。

更新日期：2020-09-30

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