Hot deformation behavior of S34MnV steel was studied by isothermal compression tests. According to the experimental results, the influence of strain rate and deformation temperature on flow stress is analyzed. The results indicate that for S34MnV steel with same deformation, the flow stress decreases with the increase in deformation temperature when the strain rate is constant, and increases with the increase in strain rate when the temperature is fixed. It established that a five-order polynomial Arrhenius-type constitutive equation which based on strain compensation. The correlation coefficient R between the predicted value and the experimental value is 0.9943, and the average absolute relative error (AARE) (%) value is calculated to be 3.9749%. The dynamic material model (DMM) diagram of thermal processing map is also drawn to investigate the workability of S34MnV steel, and it suggests that the best thermal processing conditions for S34MnV steel are predicated to be within the strain rate range of 0.03–0.6 s⁻¹ and deformation temperature range of 1030–1150 °C. In the suggested domains, the peak value of the power dissipation efficiency is between 34% and 39%.

中文翻译：

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船用曲轴S34MnV钢热变形行为研究

通过等温压缩试验研究了S34MnV钢的热变形行为。根据实验结果，分析了应变速率和变形温度对流变应力的影响。结果表明，对于相同变形量的S34MnV钢，当应变速率一定时，流变应力随着变形温度的升高而减小，而在温度一定时，随着应变速率的增大而增大。建立了一个基于应变补偿的五阶多项式Arrhenius型本构方程。相关系数R预测值与实验值之差为0.9943，计算平均绝对相对误差（AARE）（%）值为3.9749%。还绘制了热处理图的动态材料模型（DMM）图来研究 S34MnV 钢的可加工性，表明 S34MnV 钢的最佳热处理条件预计在 0.03-0.6 s 的应变速率范围内^{- 1}和变形温度范围为1030-1150°C。在建议的域中，功耗效率的峰值介于 34% 和 39% 之间。