(哈爾濱工業(yè)大學(xué)金屬精密熱加工國防科技重點實驗室，哈爾濱 150001)
摘 要: 噴射沉積工藝作為一種新興的快速凝固技術(shù)，已經(jīng)被廣泛 地應(yīng)用于研制和開發(fā)各種高性能的快速凝固材料， 近年來發(fā)展非常迅速。 通過對噴射沉積工藝參數(shù)的分析和調(diào)整， 制備了不同形狀的AlCuFeNiCeZr合金沉積毛坯， 實現(xiàn)了對噴射沉積毛坯的形狀和尺寸的初步控制；同時研究了過噴粉末的粒度分布規(guī)律以及沉積毛坯 的致密度和顯微組織。 結(jié)果發(fā)現(xiàn)， 傾斜噴射(θ≠0)，沉積器抽拉(V≠0)和自旋 (ω≠0)條件下， 可以有效地改善沉積坯的幾何外形， 獲得形狀較好的盤、柱狀沉積坯， 其致密度大于96%， 沉積坯組織細小、 均勻，晶粒的平均尺寸為5μm左右，過噴粉末的平均粒度為30μm。
關(guān)鍵字: 噴射沉積 鋁合金 形狀控制
（School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China）
Abstract:As a novel rapidly solidifed technique, spray deposition has developed very quickly these years. It has been used to produce much rapidly solidified material with perfect properties. The as-deposits of AlCuFeNiCeZr alloy with different shapes were fabricated by controlling or adjusting the parameters of spray deposition technique. Meanwhile, the microstructures and relative density of preform have been studied. The as-deposits with perfect shape and high relative density(above 96%) was fabricated when the parameters were kept as θ≠0(θ: Tilt angle), V≠0(V: Withdrawal rate) and ω≠(ω: Rotation speed). The microstructure is so fine that the average grain size is about 5 μm. Segregation is minimized so that homogenisation is usually not necessary. The average diameter of overspray powders is about 30 μm.
Key words: spray depostion aluminium alloy controlled shpae
