(哈尔滨工业大学金属精密热加工国防科技重点实验室，哈尔滨 150001)
摘 要: 采用喷射成形技术制备了镍基高温合金沉积坯，对合金沉积态、热等静压态和热处理态的显微组织进行了观察，并对其热处理后的维氏硬度、拉伸性能及断裂组织特征进行了测试和分析。结果表明，喷射成形高温合金组织细小、均匀, 呈现出典型的快速凝固组织特征。合金具有良好的高温组织稳定性，适宜的热等静压和热处理可使材料具有良好的拉伸性能。
关键字: 喷射成形 高温合金 显微组织
（National Defense S and T Key Lab of Metal Precision Hot Processing,
Harbin Institute of Technology, Harbin 150001, P. R. China）
Abstract:A Nickel-Based superalloy was manufactured by spray forming. The microstructures of as-spray deposited, HIPed and heat treated materials were observed. The Vicker's hardness and tensile properties at room temperature and high temperature of the material after HIP or heat treatment processing were tested and analyzed. The results showed that the alloy features fine and homogeneous rapid solidification microstructures. Excellent stability of microstructure at elevated temperatures, and outstanding mechanical properties at both room temperature and high temperature can be achieved by spray forming, HIP and heat treatment.
Key words: spray forming; superalloy; microstructure
