(1. 哈尔滨理工大学 材料科学与工程学院，哈尔滨 150040；
2. 哈尔滨工业大学 材料科学与工程学院，哈尔滨 150001)
摘 要: 为了揭示叶轮件模锻成形过程中金属的变形流动规律，采用有限元模拟对不同形状坯料成形过程的塑性变形流动行为进行对比分析。结果表明：叶片处是较难以充填成形的部位，且随着截面位置的下移，金属向该处型腔充填流动的趋势更为显著；与圆柱形坯料相比，阶梯形坯料成形过程中叶片部位更易于被充填成形，金属流动的均匀性也较好；通过工艺实验验证了利用阶梯形坯料可一次性成形出尺寸精度和性能均符合设计要求的叶轮锻件。
关键字: 铝合金；模锻；坯料形状；数值模拟；流动规律
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
