2,表面呈龜裂狀。主要是因為SiO2的熱膨脹系數(shù)大于VC涂層,使得SiO2在冷卻過程中受到拉應(yīng)力而發(fā)生龜裂。本研究首次表明低熔點高活性的氟化鹽可以用于TD法制備VC涂層。"/>

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3Cr13鋼表面氟鹽浴TD法VC涂層的制備及表征
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浙江工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,中國科學(xué)院上海應(yīng)用物理研究所,浙江工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,中國科學(xué)院上海應(yīng)用物理研究所,中國科學(xué)院上海應(yīng)用物理研究所,中國科學(xué)院上海應(yīng)用物理研究所,中國科學(xué)院上海應(yīng)用物理研究所

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中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項XDA02004210、國家重點研發(fā)計劃 2016YFB0700404、國家自然科學(xué)51371188,51501216、浙江省自然科學(xué)基金資助項目(LY13E010003)


The preparation and characterization of vanadium carbide coating on 3Cr13 steel by thermal diffusion process with fluoride salt bath
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College of Materials Science and Engineering,Zhejiang University of Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,College of Materials Science and Engineering,Zhejiang University of Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,

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    摘要:

    本文采用FLiNaK氟化鹽對3Cr13不銹鋼表面分別進行不同時間的熱反應(yīng)沉積(TD),利用X射線衍射儀(XRD),電子探針(EPMA),掃描電鏡(SEM),顯微維氏硬度計研究了VC涂層的形貌、成份特征、表面硬度及其生長動力學(xué)。實驗結(jié)果發(fā)現(xiàn),3Cr13不銹鋼的表面形成了3~5μm厚度的均勻致密的VC涂層,表面呈花瓣狀,VC相中含少量的Si和Fe元素。VC涂層的平均硬度高達(dá)3222HV其厚度與保溫時間滿足拋物線關(guān)系。VC涂層表面幾百nm厚度存在不均勻分布的SiO2,表面呈龜裂狀。主要是因為SiO2的熱膨脹系數(shù)大于VC涂層,使得SiO2在冷卻過程中受到拉應(yīng)力而發(fā)生龜裂。本研究首次表明低熔點高活性的氟化鹽可以用于TD法制備VC涂層。

    Abstract:

    The composition hardness and morphology of vanadium carbide(VC) coatings and their growth kinetics have been investigated by X-ray diffractometer (XRD), the electronic probe microanalysis(EPMA) scanning electron microscope (SEM), vickers indenter and energy dispersive X-ray spectrometry (EDX) on the 3Cr13 stainless steel, which was treated by FLiNaK salts for different time by the thermal diffusion carbide coating process (TD). It was found that VC coatings with the thickness of 3~5 μm formed on the surface of 3Cr13 stainless steel for different treatment time . The coatings displayed petal-shaped and contained a handful of Si and Fe.The average hardness of the VC coating up to 3222 HV and there was a parabola relationship between the thickness of the coatings and the treatment time. VC coatings were covered by rimous SiO2 phases with the thickness of hundreds of nanometers. The cracks of SiO2 phases resulted from the tensile stress during the cooling process,which derived from the different thermal expansivity between VC coating and SiO2 phase. The present study also indicated the potential application of FLiNaK salts in TD process.

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張潔,蔣力,謝德明,黎超文,黃鶴飛,李志軍,李曉麗.3Cr13鋼表面氟鹽浴TD法VC涂層的制備及表征[J].稀有金屬材料與工程,2017,46(7):2028~2034.[Zhang Jie, Jiang Li, Xie Deming, Li Chaowen, Huang Hefei, Li Zhijun, Li Xiaoli. The preparation and characterization of vanadium carbide coating on 3Cr13 steel by thermal diffusion process with fluoride salt bath[J]. Rare Metal Materials and Engineering,2017,46(7):2028~2034.]
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  • 收稿日期:2016-07-15
  • 最后修改日期:2016-08-25
  • 錄用日期:2016-09-18
  • 在線發(fā)布日期: 2017-11-14
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