Fe-3.0%Si-0.09%Nb取向硅钢的高温流变应力

发布时间：2018-06-16 08:39

本文选题：取向硅钢 + 真应力-真应变曲线　；参考：《机械工程材料》2017年12期

【摘要】：通过热模拟试验机测定了Fe-3.0%Si-0.09%Nb取向硅钢在不同变形温度和应变速率下的真应力-真应变曲线,分析了变形参数对流变应力的影响规律,通过线性回归分析计算出该取向硅钢的热变形应力指数n以及变形激活能Q,并构建了流变应力本构方程。结果表明:该取向硅钢的真应力-真应变曲线为动态回复型,其变形时的流变应力主要取决于变形温度和应变速率;当应变速率一定时,流变应力随着变形温度的升高而减小;变形温度一定时,流变应力随着应变速率的增大而增大;用构建的Fe-3.0%Si-0.09%Nb取向硅钢流变应力本构方程计算得到的流变应力与通过试验测得的结果相吻合。
[Abstract]:The true stress-true strain curves of Fe-3.0 Si-0.09Nb oriented silicon steel at different deformation temperatures and strain rates were measured by a thermal simulation machine, and the effect of deformation parameters on rheological stress was analyzed. The thermal deformation stress exponent (n) and deformation activation energy (Q) of the oriented silicon steel were calculated by linear regression analysis, and the constitutive equation of rheological stress was established. The results show that the true stress-true strain curve of the oriented silicon steel is of dynamic recovery type and the rheological stress is mainly determined by the deformation temperature and strain rate when the strain rate is constant the rheological stress decreases with the increase of deformation temperature. When the deformation temperature is constant, the rheological stress increases with the increase of strain rate, and the rheological stress calculated by the constitutive equation of Fe-3.0Si-0.09Nb-oriented silicon steel is in agreement with the experimental results.
【作者单位】：华北理工大学冶金与能源学院河北省现代冶金技术重点实验室;
【基金】：国家自然科学基金资助项目(51274083,51674123) 河北省高等学校创新团队领军人才培育计划项目(LJRC007) 河北省自然科学基金资助项目(E2015209228)
【分类号】：TG142.1

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