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为了分析15Cr Mo R钢的高温变形行为,在Gleeble-1500D热模拟试验机上对其进行了热压缩实验。依据不同温度和不同应变速率下的实验数据,通过把Zener-Hollomon参数和材料参数的函数导入Arrhenius-type方程,建立了15Cr Mo R钢的本构方程。结果表明:测试的流变应力曲线类型为平稳类型和单峰类型,但其试样组织均发生了动态再结晶;使用建立的本构方程计算的流变应力值与实验结果有很好的一致性(相关系数R=0.9273和平均相对误差AARE=2.14%)。
In order to analyze the high temperature deformation behavior of 15Cr Mo R steel, the hot compression tests were performed on a Gleeble-1500D thermal simulation tester. Based on the experimental data at different temperatures and different strain rates, the constitutive equation of 15Cr Mo R steel was established by introducing the function of Zener-Hollomon parameters and material parameters into the Arrhenius-type equation. The results show that the types of flow stress curves tested are stationary type and unimodal type, but dynamic recrystallization occurs in the microstructure of the samples. The calculated flow stress values using the established constitutive equations are in good agreement with the experimental results (Correlation coefficient R = 0.9273 and mean relative error AARE = 2.14%).