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超音速火焰喷涂WC-12Co、WC-10Co4Cr和Cr3C2-25NiCr涂层在不同介质中摩擦行为研究
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1.江西理工大学;2.崇义章源钨业股份有限公司

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国家级大学生创新创业训练计划项目(202010407014);江西省教育厅自然科学基金面上项目(GJJ200807);江西省主要学术和技术带头人培育计划青年人才项目(20212BCJ23005)


Friction Behavior of WC-12Co、WC-10Co4Cr and Cr3C2-25NiCr coatings under different media*
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National innovation and entrepreneurship training program for college students (202010407014); General project of Natural Science Foundation of Jiangxi Provincial Department of Education (gjj200807); Young talent project of Jiangxi Province"s major academic and technical leaders cultivation program (20212bcj23005)

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    摘要:

    为了研究硬面涂层在不同介质中的摩擦行为,以WC-12Co、WC-10Co4Cr和Cr3C2-25NiCr硬面材料为原料,采用超音速火焰喷涂制备得到了三种不同成分的硬面涂层。通过显微硬度计、摩擦磨损仪和扫描电镜等对涂层性能分析,结果表明,涂层中的孔隙率和粘结相的含量密切相关,当粘结相含量为12wt.%(Co)时,其孔隙度为1.11%;粘结相含量为14wt.%(CoCr)时,其孔隙度为0.98%;粘结相含量为25wt.%(NiCr)时,其孔隙度降低为0.92%。空气中,WC-10Co4Cr的硬度最高,其摩擦系数最小;Cr3C2-25NiCr的硬度最小,其摩擦系数最大。1mol/L HCl的环境中,NiCr的耐腐蚀性能最好,使Cr3C2-25NiCr涂层的摩擦系数稳定;而纯Co和CoCr的耐腐蚀性能较差,使WC-10Co4Cr和WC-12Co涂层的摩擦系数呈现出波浪状的变化规律。1mol/L NaOH的环境的摩擦过程中,硬质相的腐蚀会使涂层表面的硬度下降,使摩擦系数增加。

    Abstract:

    In order to study the friction behavior of hard surface coatings under different media, the coatings were prepared by HVOF with WC-12Co, WC-10Co4Cr and Cr3C2-25NiCr materials as raw materials. The properties of the coatings were analyzed by micro-hardness tester, wear tester, scanning electron microscope and so on. The results showed that the porosity of the coating was closely related to the content of the binder phase. In air, WC-10Co4Cr had the highest hardness and the lowest friction coefficient, while Cr3C2-25NiCr had the lowest hardness and the highest friction coefficient. In the environment of 1mol/L HCl, the best corrosion resistance of NiCr binder made the friction coefficient of Cr3C2-25NiCr coating stable, and the poor corrosion resistance of pure Co and CoCr made the friction coefficient of WC-10Co4Cr and WC-12Co coatings with high and low fluctuations. In the friction process under 1mol/L NaOH environment, the corrosion of hard phase could reduce the hardness and increase the friction coefficient.

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罗鑫,王韶毅,洪源昆,吴佳逸,骆宛卿,羊求民.超音速火焰喷涂WC-12Co、WC-10Co4Cr和Cr3C2-25NiCr涂层在不同介质中摩擦行为研究[J].稀有金属材料与工程,2022,51(12):4682~4688.[Xin Luo, Shaoyi Wang, Yuankun Hong, Jiayi Wu, Wanqing Luo, Qiumin Yang. Friction Behavior of WC-12Co、WC-10Co4Cr and Cr3C2-25NiCr coatings under different media*[J]. Rare Metal Materials and Engineering,2022,51(12):4682~4688.]
DOI:10.12442/j. issn.1002-185X.20211034

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历史
  • 收稿日期:2021-11-23
  • 最后修改日期:2022-02-21
  • 录用日期:2022-03-07
  • 在线发布日期: 2023-01-19
  • 出版日期: 2022-12-30