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鈦合金表面激光熔覆AlCoCrFeMoVTi高熵合金涂層的摩擦磨損和高溫抗氧化性能
作者:
作者單位:

昆明理工大學(xué)材料科學(xué)與工程學(xué)院

作者簡(jiǎn)介:

通訊作者:

中圖分類(lèi)號(hào):

TG174.4

基金項(xiàng)目:

國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


DI Yingnan,LIU Hongxi*,CHEN Lin,ZHANG Xiaowei,LIU Jingzhou,LIN Jianquan
Author:
Affiliation:

1.Kunming University of Science and Technology;2.LIN Jianquan

Fund Project:

Microstructure evolution characteristics and solidification kinetics mechanism of laser cladding fabrication 3D functional coating under the synergistic action of magnetic field and mechanical vibration

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    摘要:

    為提高鈦合金的摩擦磨損和高溫抗氧化性能，采用激光熔覆技術(shù)在Ti6AI4V鈦合金（TC4）表面制備了近等原子比的AlCoCrFeMoVTi高熵合金（HEA）涂層。借助X射線衍射（XRD）、掃描電鏡（SEM）、能譜儀（EDS）等分析了涂層的物相組成和顯微組織；運(yùn)用HDX-1000維氏硬度儀測(cè)試了熔覆層顯微硬度；通過(guò)UMT-3摩擦磨損試驗(yàn)機(jī)和GSL-1400X 型管式電阻爐分別測(cè)試了HEA涂層的摩擦磨損性能和高溫抗氧化性能。結(jié)果表明，HEA涂層主要由面心立方（FCC）、體心立方（BCC）二元共晶相組成；HEA涂層最高顯微硬度為1099 HV0.2，是基體TC4的3.29倍；涂層摩擦系數(shù)為0.31，磨損體積為1.79×10-4 mm3，分別為基體的59.62%和12.01%；在800℃恒溫下氧化50 h后，HEA涂層的氧化增重為1.49 mg，僅為基體的16.37%。激光熔覆高熵合金AlCoCrFeMoVTi涂層能顯著改善Ti6Al4V鈦合金的摩擦磨損和高溫抗氧化性能。

    Abstract:

    In order to improve the friction and wear behavior and high-temperature oxidation resistance of titanium alloy, AlCoCrFeMoVTi high-entropy alloy (HEA) were designed and AlCoCrFeMoVTi HEA coatings were prepared by laser cladding technique on Ti6AI4V titanium alloy (TC4) surface. The phase composition and microstructure of AlCoCrFeMoVTi HEA coating were analyzed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The microhardness of coatings was measured by HDX-1000 Vickers hardness tester. The wear resistance and high-temperature oxidation resistance of the coating were tested by UMT-3 friction tester and GSL-1400X tubular resistance furnace. The results show that the AlCoCrFeMoVTi HEA coating is mainly composed of face centered cubic (FCC) structures and body centered cubic (BCC) structures binary eutectic phase. The maximum microhardness of the coating was 1099 HV0.2, which was 3.29 times that of TC4 titanium alloy substrate. The friction coefficient of the coating was 0.31, and the wear volume was 1.79×10-4 mm3, respectively 59.62% and 12.01% of the matrix. After oxidation at 800℃ for 50 h, the oxidation weight of the coating was 1.49 mg, which was only 16.37% of the matrix. Laser cladding AlCoCrFeMoVTi HEA coating can significantly improve the friction and wear behavior and high-temperature oxidation resistance of Ti6Al4V titanium alloy.

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引用本文

邸英南,劉洪喜,張曉偉,陳林,劉徑舟,藺健全,郝軒宏,王悅怡.鈦合金表面激光熔覆AlCoCrFeMoVTi高熵合金涂層的摩擦磨損和高溫抗氧化性能[J].稀有金屬材料與工程,2021,50(8):2883~2891.[DI Yingnan, Liu Hongxi, ZHANG Xiaowei, CHEN Lin, LIU Jingzhou, LIU Jingzhou, HAO Xuanhong, WANG Yueyi. DI Yingnan, LIU Hongxi*,CHEN Lin, ZHANG Xiaowei, LIU Jingzhou, LIN Jianquan[J]. Rare Metal Materials and Engineering,2021,50(8):2883~2891.]
DOI：10.12442/j. issn.1002-185X.20200654

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  • 收稿日期:2020-09-01
  • 最后修改日期:2020-12-15
  • 錄用日期:2020-12-22
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31