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鉬金屬徑向精鍛工藝的數(shù)值模擬
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Numerical Simulation of Radial Precision Forging Technology for Metal Molybdenum
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    通過熱壓縮試驗(yàn)研究鉬金屬在應(yīng)變速率為0.01~10 s-1，變形溫度為900~1450 ℃條件下的熱變形性能，建立了基于流變應(yīng)力的鉬金屬熱變形的本構(gòu)方程。應(yīng)用有限元分析軟件DEFORM中的COGGING模塊對鉬金屬棒材的徑向精鍛過程進(jìn)行模擬，確定合理的工藝參數(shù)，并對模擬結(jié)果進(jìn)行分析。結(jié)果表明：本研究提出的用于模擬結(jié)果分析的鍛透性判據(jù)合理，工藝過程和參數(shù)的確定方法正確。研究表明：影響鍛透性的主要因素為道次壓入量和錘頭傾角；影響鍛件表面質(zhì)量的主要因素為軸向送進(jìn)速度和旋轉(zhuǎn)角度。

    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.

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王玉鳳,李付國,謝漢芳,劉趁意,付靜波.鉬金屬徑向精鍛工藝的數(shù)值模擬[J].稀有金屬材料與工程,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.]
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  • 收稿日期:2008-11-12
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