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分析了热物理参数对热锻工艺数值模拟结果正确与否的重要性,设计了获得等效热参数的简易实验方法,该方法通过传热实验与数值模拟软件相结合,采用模拟数据与实测数据逼近法推导出所需参数。由于在实验细节上排除了其他因素的热干扰,该方法测得的参数可靠性和精度较高。本文以转子钢26Cr2Ni4MoV为例,通过该方法测试其在1260～850℃锻造区间的等效黑度系数为0.25～0.30,与模具钢的加载等效换热系数为1.0kW.(m2.K)-1。
The importance of the thermophysical parameters in the numerical simulation of the hot forging process is analyzed. The simple experimental method for obtaining the equivalent thermal parameters is designed. By combining the heat transfer experiment with the numerical simulation software, the simulation data and the measured data The approximation method deduces the required parameters. Due to the thermal interference of other factors is excluded in the experimental details, the reliability and accuracy of the measured parameters of the method are high. In this paper, the rotor steel 26Cr2Ni4MoV is taken as an example, the equivalent blackness coefficient of the forged section at 1260 ~ 850 ℃ is 0.25 ~ 0.30 and the equivalent heat transfer coefficient with the die steel is 1.0kW by this method. (M2.K) -1.