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TC17鈦合金加熱過程中的有限元模型
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1.中國航發(fā)動力股份有限公司;2.西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室

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科技部“國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目”(2016YFB0301203)


The FEM model of heating process for TC17 alloy
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1.AECC Aviation Power Co Ltd,Xi’an;2.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an

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    摘要:

    本文采用深埋熱電偶動態(tài)測量坯料溫度變化并耦合有限元模擬建立了TC17鈦合金的加熱模型,對其升溫過程進(jìn)行了模擬。結(jié)果表明：總換熱系數(shù)由輻射換熱系數(shù)和對流換熱系數(shù)組成,可通過數(shù)學(xué)運(yùn)算獲得,其數(shù)值與坯料溫度有關(guān),隨坯料溫度增加,總換熱系數(shù)呈增大趨勢。通過對Ф500×500mm規(guī)格坯料的升溫過程進(jìn)行有限元模擬,獲得坯料心部和半徑處的溫升曲線,經(jīng)過與熱電偶測得的實(shí)際溫升曲線對比,模擬曲線與實(shí)測曲線有較高的吻合度,坯料心部和半徑處到溫時間分別為196min和166min。采用小尺寸試樣進(jìn)行β單相區(qū)加熱試驗(yàn),通過大尺寸坯料β晶粒尺寸的比較,驗(yàn)證了有限元模型的準(zhǔn)確性。

    Abstract:

    In this paper, the heating model of TC17 titanium alloy was established by dynamic measurement of temperature for the billet with deep buried thermocouple coupled with finite element simulation and the heating process was simulated. The results show that the total heat transfer coefficient is composed of radiation heat transfer coefficient and convection heat transfer coefficient, which can be obtained by mathematical calculation. The value of total heat transfer coefficient is related to the billet temperature and increases with the increase of billet temperature. The temperature rise curves at the center and radius of the billet were obtained after the simulation of billet with dimensions Ф500×500mm. The simulation curves were in good agreement with the measured curves compared with the actual temperature rise curves measured by thermocouples. Time required to reach the set temperature at the center and radius of the billet was 196 min and 166 min respectively. The heating test with small-size sample was done in β zone and the accuracy of the finite element model is verified by comparing the beta grain sizes of large-sized billets.

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何俊,惠瑞拓,曾衛(wèi)東,徐建偉,陳威. TC17鈦合金加熱過程中的有限元模型[J].鈦工業(yè)進(jìn)展,2019,36(2).

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  • 收稿日期:2019-01-18
  • 最后修改日期:2019-01-18
  • 錄用日期:2019-03-01
  • 在線發(fā)布日期: 2020-10-22
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