GH4141高温合金固溶处理过程中的晶粒长大行为

研究了固溶温度和保温时间对GH4141合金晶粒长大的影响，并建立了合金的晶粒长大模型。结果表明，合金在固溶温度≤1080℃时，晶粒长大不明显；当温度≥1100℃时，晶粒显著长大。不同固溶温度下，晶粒尺寸均在保温时间≤60 min时迅速长大；当保温时间>60 min后，随着保温时间的延长，晶粒长大趋势逐渐趋于平缓。建立的GH4141合金的晶粒长大动力学模型可以较好地预测合金在固溶处理过程中的晶粒尺寸演变规律。

Grain growth behavior of GH4141 superalloy during solution treatment process

Effects of solution temperature and holding time on grain growth behavior of GH4141 alloy were studied, and the grain growth model of the alloy was established. The results show that when the solution temperature is less than orequal to 1080 ℃, the grain growth of the alloy is not obvious; while the grain size grows significantly when the temperature is higher than orequal to 1100 ℃. At different solution temperatures, the grain size grows rapidly when the holding time is less than or equal to 60 min; and the grain growth trends is slow with the increasing of the holding time especially when the holding time is over 60 min. The established grain growth kinetic model of the GH4141 alloy can accurately predict the grain size evolution during solution treatment.