(北京航空材料研究院，北京 100095)
摘 要: 噴射成形工藝能夠以較少的工序生產(chǎn)整體致密、成分均勻、晶粒細化、力學(xué)性能優(yōu)良的坯件，但控制噴射成形過程的獨立工藝參數(shù)卻較多，給工藝優(yōu)化帶來困難。結(jié)合所建立的3D形狀模型，針對兩種不同運動方式的沉積器，探討了噴射熔滴質(zhì)量流率沿霧化錐的軸向及徑向的空間分布，研究了霧化壓力、沉積距離、沉積器下降速度、偏心距及傾斜角對高溫合金沉積坯形狀及致密度的影響。研究結(jié)果表明，通過計算機輔助優(yōu)化工藝參數(shù)后，可以獲得所需形狀的、致密的沉積坯。
關(guān)鍵字: 噴射成形 高溫合金 質(zhì)量流率分布 形狀模型
（Institute of Aeronautical Materials, Beijing 100095, P. R. China）
Abstract:The effect of processing parameters on shape and porosity of spray formed superalloy preform was studied using a 3D shape model, in which a further investigation of the spacial distribution of mass flux in the spray cone and tow sorts of substrate motion mechanism was concerned. It was concluded that a low porosity superalloy preform with desired shape can be achieved by optimizing the processing parameters.
Key words: spray forming; superalloy; mass flux distribution; shape model
