(1. 昆明理工大學(xué) 材料與冶金工程學(xué)院, 昆明 650093;
2. 昆明貴金屬研究所, 昆明 650221)
摘 要: 提出并建立了噴射成形棒坯的沉積速度等高線模型， 利用計算機數(shù)值模擬技術(shù)計算了噴射成形空間質(zhì)量流率分布， 找到了沉積器的最佳位置zm與最佳回縮速度v的關(guān)系， 分析了不同空間位置對沉積坯端面的影響。 采用二維坐標跟蹤計算了沉積坯的形貌， 計算的結(jié)果與實際噴射成形鋁硅合金棒坯進行了比較，實驗結(jié)果與預(yù)測得到了較好的吻合。
關(guān)鍵字: 等高線模型； 噴射成形； 棒坯； 數(shù)值模擬； 噴射質(zhì)量流率
by contour line
（ 1. School of Materials and Metallurgical Engineering,
Kunming University of Science and Technology, Kunming 650093, China;
2 Kunming Institute of Precious Metals, Kunming 650221, China）
Abstract: A contour line model was presented for finding the relation between the substrate position (zm) and withdrawal velocity. The droplet flow rate in space during spray forming was analyzed by numerical calculation.The relation between optimum position (zm) and withdrawal velocity was obtain by the contour line model. The influence of substrate position to the rod surface shape were analyzed. A two dimensional model was formulated to calculate the shape of the rod through tracing surface coordinates of the rod. The calculated surface profiles were compared with those of spray-formed Al-Si alloy rods prepared on a pilot scale. The calculated results for the surface profiles were in agreement with those of the spray-formed rods.
Key words: contour line model; spray forming; rod; numerical calculation; spray mass flow rate
