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采用真空电子束焊接的方法连接FGH4096和GH4133B两种高温合金,得到具有双重性能的FGH4096-GH4133B双合金。采用Gleeble-1500D热模拟试验机对所得的双合金进行等温热模拟压缩实验,分析该双合金在变形温度为1 020~1 140℃,应变速率为0.001~1.0 s~(-1)条件下的变形行为及流变应力的变化规律,观察结果表明:流变应力受变形温度和应变速率显著影响;流变应力随变形温度的升高和应变速率的降低而降低,流变应力在经历加工硬化的上升阶段后达到硬化和软化相平衡的稳定阶段。采用双曲正弦模型确定该合金在应变为0.6时变形应力指数n和变形激活能Q分别为3.6589和557.31 kJ/mol,建立了相应的热变形本构方程。
Vacuum electron beam welding method FGH4096 and GH4133B two high-temperature alloys to obtain dual-performance dual-performance FGH4096-GH4133B alloy. The isothermal thermal simulation of the alloy was carried out on a Gleeble-1500D thermal simulator. The deformation of the alloy was investigated at deformation temperature of 1 020 ~ 1 140 ℃ and strain rate of 0.001 ~ 1.0 s ~ (-1) The results show that the flow stress is significantly affected by the deformation temperature and the strain rate. The flow stress decreases with the increase of the deformation temperature and the decrease of the strain rate. The flow stress is undergoing processing After the hardening stage of hardening to reach a stable phase of hardening and softening phase equilibrium. The hyperbolic sine model was used to determine the deformation stress exponent n and the deformation activation energy Q of the alloy at strain of 0.6 and 3.6589 and 557.31 kJ / mol, respectively. Corresponding thermal deformation constitutive equations were established.