(哈爾濱工業(yè)大學(xué)金屬精密熱加工國(guó)防科技重點(diǎn)實(shí)驗(yàn)室，哈爾濱 150001)
摘 要: 采用噴射成形技術(shù)制備了鎳基高溫合金沉積坯，對(duì)合金沉積態(tài)、熱等靜壓態(tài)和熱處理態(tài)的顯微組織進(jìn)行了觀察，并對(duì)其熱處理后的維氏硬度、拉伸性能及斷裂組織特征進(jìn)行了測(cè)試和分析。結(jié)果表明，噴射成形高溫合金組織細(xì)小、均勻, 呈現(xiàn)出典型的快速凝固組織特征。合金具有良好的高溫組織穩(wěn)定性，適宜的熱等靜壓和熱處理可使材料具有良好的拉伸性能。
關(guān)鍵字: 噴射成形 高溫合金 顯微組織
（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
