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3Cr13钢表面氟盐浴TD法VC涂层的制备及表征
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浙江工业大学材料科学与工程学院,中国科学院上海应用物理研究所,浙江工业大学材料科学与工程学院,中国科学院上海应用物理研究所,中国科学院上海应用物理研究所,中国科学院上海应用物理研究所,中国科学院上海应用物理研究所

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中国科学院战略性先导科技专项XDA02004210、国家重点研发计划 2016YFB0700404、国家自然科学51371188,51501216、浙江省自然科学基金资助项目(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氟化盐对3Cr13不锈钢表面分别进行不同时间的热反应沉积(TD),利用X射线衍射仪(XRD),电子探针(EPMA),扫描电镜(SEM),显微维氏硬度计研究了VC涂层的形貌、成份特征、表面硬度及其生长动力学。实验结果发现,3Cr13不锈钢的表面形成了3~5μm厚度的均匀致密的VC涂层,表面呈花瓣状,VC相中含少量的Si和Fe元素。VC涂层的平均硬度高达3222HV其厚度与保温时间满足抛物线关系。VC涂层表面几百nm厚度存在不均匀分布的SiO2,表面呈龟裂状。主要是因为SiO2的热膨胀系数大于VC涂层,使得SiO2在冷却过程中受到拉应力而发生龟裂。本研究首次表明低熔点高活性的氟化盐可以用于TD法制备VC涂层。

    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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张洁,蒋力,谢德明,黎超文,黄鹤飞,李志军,李晓丽.3Cr13钢表面氟盐浴TD法VC涂层的制备及表征[J].稀有金属材料与工程,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
  • 录用日期:2016-09-18
  • 在线发布日期: 2017-11-14
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