(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: 为了揭示锻件预制坯中方环件压缩变形的机理，采用有限元模拟及试验，对7075铝合金方环件压缩过程进行分析，研究工艺条件对方环件压缩变形流动行为的影响规律。结果表明：随着方环件高度的增大，压缩变形不均匀性明显增大，金属沿径向外流量显著增多，且压缩变形后金属变形行为的复杂程度也随之增大。通过工艺实验进行了验证，所得与模拟结果吻合较好，为复杂锻件预制坯工艺的制定提供了理论依据。
关键字: 铝合金；方环件；压缩；数值模拟
aluminium alloy square ring
（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 the mechanism of the square ring compression of the pre-forging billet. The numerical simulation and experiment were employed to analyze the compression of square ring with 7075 aluminium alloy. The effect of deformation condition on the metal flow behaviour of aluminium alloy during the square ring compression was analyzed. The results show that with increasing the height-diameter ratio, the uniformity of deformation increases markedly, the metal outside flow along the radial increases significantly, and the complex degree of metal flow behavior also increases evidently. The results agree well with one of the numerical simulation. This provides a theoretical reference for the investigation of pre-fabricated billet technology.
Key words: aluminium alloy; square ring; compression; numerical simulation
