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高能球磨與射頻等離子體球化制備TiAl合金球形微粉
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國家自然科學基金 (51204015)；教育部博士點新教師科研基金(20110006120023); 中央高?；究蒲袠I(yè)務費專項資金(FRF- TP-12-149A)


Fabrication of Micro-fine Spherical TiAl Alloy Powder by High-Energy Ball Milling and Radio Frequency Plasma Spheroidization
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    摘要:

    以霧化法制備的大粒度TiAl預合金粉末為原料，采用高能球磨與射頻等離子體球化工藝制備出TiAl合金微細球形粉末，并研究了其粉末特性。結(jié)果表明，采用上述工藝制備的TiAl合金粉末球形率高；粒度可控，數(shù)均粒徑可控制在10~60 μm范圍內(nèi)；粉末粒徑分布窄，粒度分布均勻度指數(shù)約為0.63。粉末氧含量隨粒度降低而逐漸增加，數(shù)均粒徑為31.5 μm的合金粉末的氧含量約為2.44‰；數(shù)均粒徑為15.6 μm的合金粉末的氧含量約為3.51‰。制備的球形TiAl合金粉末主要由α2相及少量的γ相組成；粉末顆粒間成分均勻性良好，顆粒內(nèi)部為均勻等軸晶組織，隨著粉末粒度減小，晶粒組織趨于細化

    Abstract:

    Micro-fine spherical TiAl alloy powder was prepared by high-energy ball milling and subsequent radio frequency plasma spheroidization from atomized TiAl alloy powder with big particle size. The fabrication process and powder characteristics were investigated. The results show that the obtained powder exhibits good sphericity. The number-average particle size of the powder can be accurately controlled in the range of 10~60 μm, and the powder presents a narrow size distribution with a uniformity level of about 0.63. The powder oxygen content acts as a decreasing function of the particle size, which increases from 2.44‰ to 3.51‰ when the number-average particle size decreases from 31.5 μm to 15.6 μm. The spherical TiAl alloy power is composed of α2-Ti3Al and a small amount of γ-TiAl. The powder possesses homogeneous chemical composition and uniform equiaxed grain microstructure, and the grain size tends to be refined with the decrease of the particle size

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路 新,劉程程,朱郎平,何新波,郝俊杰,曲選輝.高能球磨與射頻等離子體球化制備TiAl合金球形微粉[J].稀有金屬材料與工程,2013,42(9):1915~1920.[Lu Xin, Liu Chengcheng, Zhu Langping, He Xinbo, Hao Junjie, Qu Xuanhui. Fabrication of Micro-fine Spherical TiAl Alloy Powder by High-Energy Ball Milling and Radio Frequency Plasma Spheroidization[J]. Rare Metal Materials and Engineering,2013,42(9):1915~1920.]
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  • 收稿日期:2012-09-29
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