热等静压对In718C高温合金组织和性能的影响

Effect of HIP on Microstructure and Properties of In718C Superalloy

以In718C铸造高温合金为研究对象,观察分析了热等静压前后合金高低倍组织的变化,研究了热等静压对In718C合金组织结构和性能的影响。结果表明,In718C合金经热等静压后,铸造疏松缺陷得以基本消除,合金均匀化程度提高,Laves相、δ相得以消除,主要强化相γ″的尺寸、数量发生改变。热等静压后需对热处理进行适当调整,使γ″相尺寸形貌回复到最佳状态。

In this paper,the influence of hot-isostatic pressing(HIP)on the microstructure and properties of In718C was studied.The results showed that after the HIP,the casting porosity defect was basically eliminated,the homogenization degree of the alloy was improved,Laves phase andδphase were eliminated,and the size and quantity ofγ″phase were changed.After the HIP,it is necessary to adjust the heat treatment to make theγ″reach the appropriate size and shape.