| 基于数值模拟的粉末冶金TiAl合金叶片模锻工艺研究 |
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| 引用本文： | 张强,李慧中,梁霄鹏,陶慧.基于数值模拟的粉末冶金TiAl合金叶片模锻工艺研究[J].粉末冶金材料科学与工程,2021(1). |
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| 作者姓名： | 张强 李慧中 梁霄鹏 陶慧 |
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| 作者单位： | 中南大学材料科学与工程学院;中南大学粉末冶金国家重点实验室;中南大学有色金属材料科学与工程教育部重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(51774335);中南大学中央高校基本科研业务费专项资金资助项目(1053320190443)。 |
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| 摘 要： | 采用Deform-3D有限元软件对粉末冶金Ti-47Al-2Cr-2Nb-0.2W(摩尔分数,%)合金叶片的模锻工艺进行数值模拟研究,分析预热温度和上模速度对TiAl合金叶片锻件的等效应变场和等效应力场分布以及上模载荷的影响。结果表明,随预热温度升高和上模速度减小,叶片锻件的等效应变场和等效应力场分布更均匀,有利于提高叶片组织的均匀性。随着模锻过程的进行,由于TiAl合金加工硬化以及锻坯与模具间的摩擦增大,导致上模载荷不断增大,而预热温度升高和上模速度减小均使上模载荷显著降低。粉末冶金TiAl合金叶片模锻变形的最佳工艺参数为预热温度1200℃、上模速度0.5 mm/s。
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| 关 键 词： | 数值模拟 Deform-3D有限元软件 TIAL合金 叶片 模锻 |
Research on die forging process of powder metallurgy TiAl alloy blade based on numerical simulation |
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| ZHANG Qiang,LI Huizhong,LIANG Xiaopeng,TAO Hui.Research on die forging process of powder metallurgy TiAl alloy blade based on numerical simulation[J].materials science and engineering of powder metallurgy,2021(1). |
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| Authors: | ZHANG Qiang LI Huizhong LIANG Xiaopeng TAO Hui |
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| Affiliation: | (School of Materials Science and Engineering,Central South University,Changsha 410083,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China) |
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| Abstract: | The die forging process of powder metallurgy Ti-47Al-2Cr-2Nb-0.2W(mole fraction,%)alloy blade was studied by the way of numerical simulation using Deform-3D finite element software.The effects of preheating temperature and upper die speed on the distribution of effective strain field and effective stress field,as well as the load of upper die were analyzed.The results show that with the increase of the preheating temperature and the decrease of the upper die speed,the distribution of the effective strain field and the effective stress field of the blade forgings becomes more uniform,which is beneficial to improve the uniformity of the blade microstructure.During the die forging process,due to the increase of TiAl alloy work hardening and the friction between the forging blank and the die,the load continues to increase,and the increase in the preheating temperature and the decrease of the upper die speed can significantly reduce the load of upper die.The optimal deformation process parameters of die forging for powder metallurgy TiAl alloy blade are preheating temperature of 1200℃and upper die speed of 0.5 mm/s. |
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| Keywords: | numerical simulation Deform-3D software TiAl alloy blade die forging |
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