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半固态挤压扩展成形过程金属流动规律的有限元分析 被引量:3

FEM Analysis of Metal Flow Behavior During Continuous Extruding/Extending Forming in Semi-Solid State
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摘要 利用有限元法对半固态连续挤压扩展成形过程中扩展腔内的金属流动规律进行模拟,得到了不同模具设计参数下的金属流动规律·结果表明,高固相率半固态金属浆料以层流方式填充模具,扩展腔内半固态金属浆料流动速度从扩展腔中心区域向两边侧壁逐渐减小·随着扩展角、模具台阶长度的增大,模具出口横断面上金属流动速度趋于更加均匀,随着模具定径带宽度增大,金属流动不均匀性增加,同时台阶太长,模具扩展腔两侧会出现金属流动的死区或涡流·在合理的模具设计条件下,可以实现半固态连续挤压扩展成形· How the metal flows in the extending cavity during continuous extruding/extending forming in semi-solid state was simulated by finite element method (FEM) to investigate the metal flow behavior in the moulds designed with different parameters. The calculated results indicate that the highly solidifiable semi-solid alloy fills in the extending mould in form of laminar flow and the flow velocity decreases gradually from the center to all sides in mould. The flow velocity at the outlet of mould becomes more even with increasing extending angle or step length. However, The flow velocity at the outlet of mould becomes more uneven with increasing outlet width. There is a dead zone or vortex flow on both sides of mould when the step is too long. It is proved that the continuous extruding/extending forming can be implemented only if the mould is designed rationally.
出处 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2004年第9期859-862,共4页 Journal of Northeastern University(Natural Science)
基金 国家自然科学基金和上海宝钢集团公司联合资助项目(50274020) 国家重点基础研究发展规划项目(G2000067208-4)
关键词 半固态金属 挤压扩展 有限元方法 模具设计 A2017合金 semi-solid metal extruding/extending finite element method mould design A2017 alloy
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参考文献7

  • 1[2]Guan R G, Wen J L, Liu X H. Finite element modeling analysis of aluminum alloy 2017 thermal/fluid multiple fields during a single roll stirring process[J]. Materials Science and Technology, 2003,19(4):503-506.
  • 2GUANRenguo,LIUXianghua,等.Continuously extending extrusion forming of semisolid A2017 alloy by SRS process[J].Rare Metals,2002,21(4):271-277. 被引量:8
  • 3[5]Kiuchi M, Sugiyama S. Measuring method of solid fraction for semi-solid metals-1[A]. Proceedings of the 42nd JSTP Conference[C]. Tokyo:Tokyo University of Technology, 1991.647-650.
  • 4[6]Jung H K, Kang C G. Reheating process of cast and wrought aluminum alloys for thixoforging and their globularization mechanism[J]. Journal of Materials Processing Technology, 2000,104(2):244-253.
  • 5[8]Li Y M, Xing S M, Zhai Q J. Numerical simulation of semi-solid continuous casting process[J]. Trans Nonferrous Met Soc China, 2001,11(3):378-381.
  • 6[9]Koke J, Modigell M. Flow behaviour of semi-solid metal alloys[J]. J Non-Newtonian Fluid Mech, 2003,112(2):141-160.
  • 7[10]Feritas E R D, Ferrante M. Rheological behaviour and deformation characteristics of a commercial and laboratory-cast Al-4%Cu alloy in the semi-solid state[J]. Acta Mater, 2001,49(6):3839-3847.

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同被引文献38

  • 1罗守靖,田文彤,李金平.21世纪最具发展前景的近净成形技术——半固态加工[J].特种铸造及有色合金,2001,21(S1):175-180. 被引量:19
  • 2刘顺发,马振州,陈洪斌.强激光热斑形成及其稳定性研究[J].光电工程,1995,22(5):15-20. 被引量:5
  • 3齐乐华,史忠科,周计明,李贺军.液-固挤压复合材料工艺参数的优化设计[J].金属学报,2005,41(10):1025-1030. 被引量:3
  • 4[1]FLEMINGS M C.Behavior of metal alloys in the semi-solid state[J].Metallurgical Transactions A,1991,22 (5):957-981.
  • 5[4]KOPP R.Different concepts of thixoforging and experiments for rheological date[J].Journal of Materials Processing Technology,2001,111:48-52.
  • 6[6]KAPRANOS P,KIRKWOOD D H.Thixoforming of an automotive part in A390 hypereutectic Al-Si alloy[J].Journal of Materials Processing Technology,2003,135:271-277.
  • 7[7]ROVIRA M M.Thixo-forming of Al-Cu alloys[J].Journal of Materials Processing Technology,1999,42-49:92-93.
  • 8[8]CHAYONG S.Thixoforming 7075 aluminium alloys[J].Materials Science and Engineering A,2005,390:3-12.
  • 9[9]LI He-jun,QI Le-hua,LUO Shou-jin,et al.Research into the properties and microstructure of ZA13 alloy tubes formed by liquid extrusion[J].Journal of Materials Processing Technology,1995,55:19-23.
  • 10[10]QI Le-hua.The influence of liquid extrusion on the microstructure and properties of an Al-Si alloy[J].Materials and Manufacturing Processes,1998,13(3):405-413.

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