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摘要：
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设计了不同的TC11钛合金叶轮精密成形方案及模具装置,采用三维有限元程序DEFORM-3D对叶轮的等温成形过程进行数值模拟,研究了成形方案、模具结构和坯料形状等因素对成形过程中金属流动规律的影响,给出了不同压下量下锻件内部应力、应变分布情况及不同方案下载荷比较。研究结果表明:采用等温成形技术可整体精密成形出带径向扭曲叶片的叶轮类锻件;采用较细的圆柱形坯料成形可有效地提高金属充填模腔的能力并降低成形所需载荷。模拟结果与实验相符,可有效指导实际生产工艺的制定。
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Different forming schemes and die devices were designed in order to precisely form TC11 titanium alloy impeller.The isothermal forging process of impeller was simulated using three-dimensional finite element code DEFORM-3D to study the influences of forming scheme,die structure and billet shape on the metal flow rule.Stress and strain distributions on the forging piece at different height reductions were presented.Load pressures using different forging schemes were also compared.The results show that components,such as the impeller with radial twisted blades can be precisely forged by the technology of isothermal forming.The die cavity is easily filled up under lower forging pressure using cylindrical billet with small diameter.Simulated result has a good agreement with experiment and can direct the practical manufacture effectively.
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作者简介：
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参考文献：
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[1]李苏洋,罗迎社,李颂文,等.TC11钛合金盘等温流变成形的数值模拟及其生产应用[J].热加工工艺,2001,(1):22-25.
[2]冯斌,王忠堂,张士宏,等.TC11钛合金的高温变形力学行为[J].沈阳理工大学学报,2006,6(25):68-71.
[3]曲银化,孙建科,孟祥军.钛合金等温锻造技术研究进展[J].钛工业进展,2006,23(1):6-9.
[4]庞克昌.热模/等温精密锻造技术的发展[J].上海钢研,2005,(1):3-6.
[5]Rebelo N,Rydstad H,Schroder G.Simulation of MaterialFlow in Closed-die Forging by Model Techniques and Rigid-plastic FEM[M].Num.Meth.Ind.Form.Proc.Swansea.U K:Pineridge Press,1982.
[6]Hu Z M,Brook J W,Dean T A.Experimental and theoreti-cal analysis of deformation and microstructural evolution inthe hot-die forging of titanium alloy aerofoil sections[J].Journal of Materials Processing Technology,1999,88(1-3):251-265.
[7]Argyris J H,Doltsinis J S,Luginsland J.Three-dimensionthermomechanical analysis of metal forming processes[A].Proc.Int.Workshop Simulation of Metal Forming Processesby the Finite Element Method[C].Stuttgart,1985.
[8]Yang D Y,Lee N K,Yoon J H.A three-dimension of iso-thermal turbine blade forging by the rigid-viscoplastic finite-element method[J].Journal of Material Engineering and Per-formance,1993,2:119-124.
[9]Zhan Mei,Yang He,Liu Yu-li.Deformation characteristicof the precision forging of a blade with a damper platform u-sing 3D FEM analysis[J].Journal of Materials ProcessingTechnology,2004,150(3):290-299.
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