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采用热等静压扩散连接工艺,获得了DD402单晶合金与FGH95合金的扩散偶。研究了热等静压温度对扩散偶的持久性能、组织结构的影响。结果表明,不同温度热等静压的扩散偶均实现了冶金结合;结合界面区形成了一个组织过渡区,DD402单晶合金中的γ′相粒子在HIP过程中发生了筏形化;热处理后结合界面区的γ′相形貌和尺寸未发生明显变化。1 166℃热等静压扩散偶的650℃持久性能偏低,断口在DD402单晶合金侧,断裂面从结合界面区的大尺寸γ′相起始,沿{111}滑移面向筏形γ′相区扩展。
The hot isostatic pressing diffusion bonding process was used to obtain the diffusion couple of DD402 single crystal alloy and FGH95 alloy. The effects of hot isostatic pressing temperature on the durability and microstructure of the diffusion couple were studied. The results show that the metallurgical bonding is achieved at all the hot isostatic pressure diffusion couples at different temperatures, and a transition zone is formed in the interface zone. The γ ’phase particles in the DD402 single crystal alloy undergo raft formation in the HIP process. After heat treatment There is no obvious change of γ ’phase morphology and size in the interface area. The brittleness at 1 600 ℃ of 1 166 ℃ is low. The fracture surface is on the side of DD402 single crystal alloy. The fracture surface starts from the large γ ’phase in the bonded interface region, Phase expansion.