(1. 哈爾濱理工大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150040；
2. 哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150001)
摘 要: 為了揭示葉輪件模鍛成形過程中金屬的變形流動規(guī)律，采用有限元模擬對不同形狀坯料成形過程的塑性變形流動行為進(jìn)行對比分析。結(jié)果表明：葉片處是較難以充填成形的部位，且隨著截面位置的下移，金屬向該處型腔充填流動的趨勢更為顯著；與圓柱形坯料相比，階梯形坯料成形過程中葉片部位更易于被充填成形，金屬流動的均勻性也較好；通過工藝實驗驗證了利用階梯形坯料可一次性成形出尺寸精度和性能均符合設(shè)計要求的葉輪鍛件。
關(guān)鍵字: 鋁合金；模鍛；坯料形狀；數(shù)值模擬；流動規(guī)律
aluminum alloy forging parts
（1. College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:In order to reveal flow laws of impeller parts in die forging process, the deformation and flow of different shape blank forming process was studied using the finite element method. The results show that cylindrical shape can be formed more easily; stepped shape billet occurs mainly in the end. Compared with cylindrical shape, the mode cavity of blade parts fills more easily, and the uniformity of metal flow also increases significantly. The dimensional accuracy and performance meet the design requirements using stepped shape to manufacture impeller through experiment process analysis verification.
Key words: aluminum alloy; die forging; billet shape; numerical simulation; flow laws
