将Inconel 625镍基高温合金分别加热到1 050，1 150 ℃，保温1.5 h后在16 kJ锻压能量下锻压并水淬，测试了其形变量、晶粒尺寸以及锻压力；分别采用定义法和切片法计算合金理论形变量，采用有限元锻压模型模拟合金晶粒尺寸，并与试验值进行了对比。结果表明：试验合金在1 150 ℃下的形变量为17 mm，比在1 050 ℃下的高约2 mm，最大锻压力比在1 050 ℃下的低；理论形变量与试验值的相对误差约为5%，用切片法和定义法均能较准确地预测合金形变量；模拟得到加热至1 150 ℃时合金的晶粒尺寸大于加热至1 050 ℃时的，加热至1 150 ℃锻压并淬火后表面和心部的晶粒度等级与试验值的相对误差均小于10%，模拟结果较准确。

Inconel 625 Ni-based superalloy was heated to 1 050, 1 150 ℃ for 1.5 h, respectively, forged under forging energy of 16 kJ, and water quenched. The deformation amount, grain size and forging force were measured. Theoretical deformation amounts of the alloy were calculated by definition and slice methods, respectively. Grain size of the alloy was simulated by finite element forging model. The calculation and simulation were compared with experiments. The results show that the deformation amount of the tested alloy was 17 mm at 1 150 ℃, about 2 mm larger than that at 1 050 ℃, and the maximum forging force was lower than that at 1 050 ℃. The relative error between theoretical deformation amount and the experiment was about 5%, indicating that both the definition method and slice method can predict deformation amounts accurately. By simulation, the grain size of the alloy when heating to 1 150 ℃ was obviously higher than that when heating to 1 050 ℃. After heating to 1 150 ℃, forging and quenching, relative errors of the simulated grain size number in surface and core with the experiments were below 10%; the simulation was relatively accurate.