3Al、AlNb2、α-Ti三種物相組成；Ti-Al-Nb涂層的顯微硬度值沿層深方向呈平緩的梯度分布,平均硬度為597 HV,比TC4基體(360 HV)提高了66%；涂層平均摩擦系數(shù)為0.45,比TC4鈦合金(0.33)降低了27%；涂層的磨損體積為0.044 mm3,耐磨性是鈦合金基體(0.13 mm3)的2.95倍。"/>

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TC4鈦合金表面激光合金化Ti-Al-Nb涂層的研究
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江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院,江蘇大學(xué) 先進(jìn)制造與現(xiàn)代裝備技術(shù)工程研究院

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江蘇大學(xué)拔尖人才工程基金(1211110001)、江蘇省優(yōu)勢(shì)學(xué)科資助


Research on Ti-Al-Nb Coating by Laser Alloying on TC4 Titanium Alloy
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Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University

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The Fund of Technological Innovation of Liaoning Shihua University (2011-XJJ014)

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    摘要:

    以鈦鋁鈮單質(zhì)元素球磨混合粉末為原料,采用激光合金化技術(shù)在TC4鈦合金表面成功制備出Ti-Al-Nb合金涂層。分析了涂層的物相組成、組織形貌及成分、顯微硬度,并利用YG6球?qū)δ?lái)測(cè)試涂層在干摩擦條件下的摩擦磨損性能。結(jié)果表明：在激光功率P=1.8 kW,掃描速度V=5 mm/s,光斑直徑D=2 mm下制備的涂層整體均勻致密、無(wú)裂紋,與TC4基體呈良好的冶金結(jié)合；涂層組織主要由Ti3Al、AlNb2、α-Ti三種物相組成；Ti-Al-Nb涂層的顯微硬度值沿層深方向呈平緩的梯度分布,平均硬度為597 HV,比TC4基體(360 HV)提高了66%；涂層平均摩擦系數(shù)為0.45,比TC4鈦合金(0.33)降低了27%；涂層的磨損體積為0.044 mm3,耐磨性是鈦合金基體(0.13 mm3)的2.95倍。

    Abstract:

    Ti-Al-Nb alloy coating is successfully fabricated on the surface of TC4 titanium alloy by laser alloying using Ti, Al, Nb milled powders as the raw material. The phase composition, microstructure and micro-hardness of the coating are investigated. The friction wear property of the coating is tested with the YG6 ball as counter-body under dry lubrication. The results show that under the laser power 1.8kW,scanning speed 5mm/s and spot diameter 2mm, the coating is uniformdense and crack-free, and it has a good metallurgical combination with the TC4 substrate. Microstructure of the coating mainly consists of Ti3Al, AlNb2 and α-Ti. The micro-hardness of the coating (between 580 ~ 630HV) is significantly higher than that of the TC4 matrix (350~360HV). The friction coefficient of Ti-Al-Nb coating is reduced (0.33 vs. 0.45) and the wear resistance is 2.95 times greater than that of the substrate.

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戈曉嵐,仲奕穎,許曉靜,陶俊,劉慶輝,吳桂蘭,何星華. TC4鈦合金表面激光合金化Ti-Al-Nb涂層的研究[J].稀有金屬材料與工程,2017,46(8):2266~2270.[Ge Xiao-lan, Zhong Yi-ying, Xu Xiao-jing, Tao Jun, Liu Qing-hui, Wu Gui-lan, He Xing-hua. Research on Ti-Al-Nb Coating by Laser Alloying on TC4 Titanium Alloy[J]. Rare Metal Materials and Engineering,2017,46(8):2266~2270.]
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  • 收稿日期:2015-04-15
  • 最后修改日期:2015-06-10
  • 錄用日期:2015-08-11
  • 在線(xiàn)發(fā)布日期: 2017-11-16
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