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用Gleeble1500D模拟试验机在变形温度为950～1 200℃、应变速率为0.01～8s-1、最大变形程度为60%的条件下,对硅钢50A1300做单道次压缩试验,首先分析了不同参数对流变应力的影响,然后用回归法确定了应力模型中的变形激活能及材料常数,得到硅钢50A1300在峰值应力条件和稳态应力条件下的变形激活能分别为270.360和91.557kJ/mol,同时得到了流变峰值应力模型,模型的相关系数为0.997。最后通过作lnθ-ε图的方法找到了硅钢50A1300发生动态再结晶的临界应变量,并回归得到峰值应变量、临界应变量与参数Z/C的关系式。
Using Gleeble1500D simulator, the single pass compression test of silicon steel 50A1300 was carried out under the conditions of deformation temperature of 950 ~ 1200 ℃, strain rate of 0.01 ~ 8s-1 and maximum deformation degree of 60%. The different parameters of convection Then the deformation activation energy and the material constant in the stress model were determined by the regression method. The deformation activation energy of the silicon steel 50A1300 under the peak stress condition and the steady stress condition were 270.360 and 91.557 kJ / mol, respectively. Simultaneously, The rheological peak stress model, the correlation coefficient of the model is 0.997. Finally, the critical strain of dynamic recrystallization of silicon steel 50A1300 was found by the method of lnθ-ε, and the relationship between peak strain and critical strain and parameter Z / C was obtained by regression.