In order to study the thermal deformation behavior of a low-carbon steel, the samples were subjected to a single-pass thermal compression test on the Gleeble-1500 thermal simulator. The compression temperature was 900-1200 °C, and the strain rate was 0.01-10 s⁻¹. Based on the experimental results, a strain-compensated Arrhenius constitutive model and a physical constitutive model based on dynamic recrystallization were established. The correlation coefficient and average absolute relative error were used to appraisal the accuracy of models. These models were compared and both models can be used to predict the hot deformation behavior of the test steel. Furthermore, processing maps were established at the strains of 0.2, 0.4, 0.6, 0.8 and 1.0 to study the optimal processing conditions for the tested steel. The processing maps imply that two plastic instability zones formed at the areas of low temperature with high strain rate and high temperature with high strain rate, where the hot working process should be avoided. The optimal processing conditions for the tested steel are 1100-1175 °C and 1.35×10⁻¹–6×10⁻¹ s⁻¹.

为了研究低碳钢的热变形行为，样品在 Gleeble-1500 热模拟器上进行了单程热压缩测试。压缩温度为900-1200℃，应变速率为0.01-10 s ^-1. 根据实验结果，建立了应变补偿的Arrhenius本构模型和基于动态再结晶的物理本构模型。用相关系数和平均绝对相对误差来评价模型的准确性。对这些模型进行了比较，两种模型均可用于预测试验钢的热变形行为。此外，在应变为 0.2、0.4、0.6、0.8 和 1.0 时建立了加工图，以研究试验钢的最佳加工条件。加工图意味着在低温高应变率区域和高温高应变率区域形成两个塑性不稳定区，应避免热加工过程。试验钢的最佳加工条件为1100-1175℃和1.35×10^-1 –6×10 ^-1 s ^-1。