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TB8鈦合金間歇式真空氣體滲氮層的組織與性能
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貴州師范大學(xué)材料與建筑工程學(xué)院

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TG146.2

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Microstructure and property of intermittent vacuum gas nitriding layer on TB8 titanium alloy
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School of Materials and Architecture Engineering,Guizhou Normal University

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    摘要:

    為了提高表面硬度和耐磨性,對(duì)TB8鈦合金進(jìn)行間歇式真空氣體滲氮處理。利用XRD和SEM分析了改性層的物相組成和顯微組織,并對(duì)改性層的表面硬度和耐磨性進(jìn)行了研究。結(jié)果表明,TB8鈦合金經(jīng)800 ℃間歇式真空氣體滲氮4 h后,表面改性層物相主要由TiN、TiN0.3、Ti2AlN、及α-Ti組成,滲氮層組織致密,與基體結(jié)合良好,表面硬度為900-950HV,比基體硬度提高了近3倍,硬化層厚度為80-100 μm,由于表面形成了梯度硬化層,耐磨性得到了極大改善。

    Abstract:

    The intermittent vacuum gas nitriding (IVGN) process was introduced to improve the surface properties of TB8 titanium alloys. The phase constitution and microstructure of the surface-modified layer were measured by XRD and SEM, and the surface hardness and wear resistance of the treated samples were analyzed. The results indicated that a surface-modified layer composed of TiN, TiN0.3, and Ti2AlN was formed after IVPN treatment at 800 ℃ for 4 h. The microstructure of modified layer was dense and had a good bonding with its substrate. The surface hardness of treated samples was up to 850-900 HV, which was three times as much as that of the untreated samples. The thickness of hardened layer was about 80-100μm. The wear resistance was greatly improved due to the formation of a gradient hardened layer.

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楊闖,馬亞芹,劉靜. TB8鈦合金間歇式真空氣體滲氮層的組織與性能[J].稀有金屬材料與工程,2019,48(10):3136~3141.[Yang Chuang, Ma Yaqin, Liu Jing. Microstructure and property of intermittent vacuum gas nitriding layer on TB8 titanium alloy[J]. Rare Metal Materials and Engineering,2019,48(10):3136~3141.]
DOI：10.12442/j. issn.1002-185X.20180394

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  • 收稿日期:2018-04-18
  • 最后修改日期:2018-05-02
  • 錄用日期:2018-08-09
  • 在線發(fā)布日期: 2019-11-01
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