Incoloy625高温合金的热锻造行为研究

Study on Hot Forging Behavior of Incoloy625 Superalloy

为了研究Incoloy625镍基高温合金的热锻造行为,利用Gleeble-3800热模拟试验机对合金圆柱试样进行等温压缩试验。其最大真应变为0.8,变形温度分别为950,1000,1050,1100,1150,1200℃,应变速率为0.1,1,5,10,50,80 s^-1。分析了真应力-真应变曲线,获取不同参数下的最大变形抗力。结果表明：变形抗力（流动应力）随着应变速率的增加和变形温度的降低而增加。通过线性回归分析获得了Incoloy625镍基高温合金950～1200℃时的变形激活能为679.6 kJ/mol和高温变形本构方程。

In order to study the hot forging behavior of Incoloy625 nickel base superalloy, the isothermal compression tests of alloy cylindrical specimens were carried out by using Gleeble-3800 thermal simulator. The maximum true strain was 0.8, the deformation temperatures were 950,1000,1050,1100,1150 and 1200 ℃, and the strain rates were 0.1, 1, 5, 10, 50 and 80 s^-1. The true stress-true strain curve was analyzed, and the maximum deformation resistance under different parameters were obtained. The results show that the deformation resistance （flow stress） increases with the increase of strain rate and the decrease of deformation temperature. The deformation activation energy of Incoloy625 superalloy was 679.6 kJ/mol and the constitutive equation of high temperature deformation was obtained by linear regression analysis at 950-1200 ℃.