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王玉凤,李付国,谢汉芳,刘趁意,付静波.钼金属径向精锻工艺的数值模拟[J].稀有金属材料与工程(英文),2009,38(12):2136~2140.[Wang Yufeng,Li Fuguo,Xie Hanfang,Liu Chenyi,Fu Jingbo.Numerical Simulation of Radial Precision Forging Technology for Metal Molybdenum[J].Rare Metal Materials and Engineering,2009,38(12):2136~2140.]
Numerical Simulation of Radial Precision Forging Technology for Metal Molybdenum
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Received:November 12, 2008  
DOI:
Key words: molybdenum  thermal simulation experiment  constitutive equation  simulation  forging penetration efficiency
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Author NameAffiliation
Wang Yufeng Northwestern Polytechnical University, Xi’an 710072, China 
Li Fuguo Northwestern Polytechnical University, Xi’an 710072, China 
Xie Hanfang Northwestern Polytechnical University, Xi’an 710072, China 
Liu Chenyi Northwestern Polytechnical University, Xi’an 710072, China 
Fu Jingbo Jinduicheng Molybdenum CO., LTD, Xi’an 710068, China 
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Abstract:
      Hot workability of metal molybdenum was investigated by means of hot compression tests carried out in the temperature range of 900~1450 ℃ and strain rate range of 0.01~10 s-1. A constitutive equation of molybdenum for the flow stress was presented. The radial precision forging process of the molybdenum bar was simulated by COGGING modular of FEM software DEFORM. Reasonable process parameters were determined, and the forging penetration efficiency was explored from the strain-effective state. The results show that the forging penetration efficiency criterion put forward for the simulation result analysis is reasonable. Determination methods of the process and parameters are correct. Research shows that the main factors influencing forging penetration efficiency are reduction in pass and the dip angle of the hammer, and the main factors influencing forged piece surface quality are axle feeding speed and rotation angle.