(北京航空材料研究院, 北京 100095)
摘 要: 利用氬氣霧化噴射沉積技術(shù)制備了鎳基高溫合金沉積坯，沉積坯整體致密、組織均勻、無宏觀偏析、含氣量低。從霧化顆粒特性、沉積坯的孔隙度、晶粒度、微觀組織等方面評(píng)價(jià)了沉積坯質(zhì)量，并進(jìn)行了工藝優(yōu)化，初步研究了沉積坯孔隙度的形成和影響機(jī)制。另外，還研究了熱等靜壓對沉積坯孔隙度和微觀組織的影響。
關(guān)鍵字: 噴射成形 高溫合金 孔隙度 微觀組織 熱等靜壓
（Institute of Aeronautical Materials, Beijing 100095, P. R. China）
Abstract:In order to reduce the porosity in argon spray formed super alloy preforms, the spray atomization and deposition variables were optimized. High-quality preforms with high-density, homogenous microstructures, segregation-free macrostructure and low gas contents were spray formed using argon as atomization gas. The deposited preforms were evaluated and the formation mechanisms of preform porosity were preliminarily investigated. The effects of hot isostatic pressing on the density and microstructure of argon spray formed Ni-base superalloy preforms were also studied.
Key words: spray forming; superalloys; porosity; microstructure; hot isostatic pressing
