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Y含量对Fe-Cr-C-B-Ti熔覆金属成型性及摩擦磨损性能影响
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沈阳工业大学材料科学与工程学院

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The influence of Y content on the formability and friction wear of Fe-Cr-C-B-Ti cladding metals
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Shenyang University of Technology

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    摘要:

    磨损、腐蚀、疲劳构成了机械零件失效的三种形式,其中机械零件的磨损造成的能源消耗和经济损失尤为严重。通过等离子堆焊的方法制备Fe-Cr-C-B-Ti-Y系耐磨熔覆金属。采用MLS-23型橡胶轮式湿砂磨损试验机分析了熔覆金属的磨损性能。采用XRD、SEM、EBSD和TEM分析了熔覆金属的物相组成和显微组织,并对合金的强化机理和磨损机理进行了探讨。结果表明:Fe-Cr-C-B-Ti-Y熔覆金属中显微组织由奥氏体γ-Fe+M23(C,B)6共晶碳化物+TiC硬质相组成。随着Y2O3添加量的增多,熔覆金属的硬度与磨损量呈现先增加后减小的变化趋势。当Y2O3含量为0.4 %时,TiC硬质相与M23(C,B)6共晶碳化物析出量最多,组织晶粒最为细小。熔覆金属成型性最好,润湿角最小,为52.2°。此时,熔覆金属的洛氏硬度值为89.7 HRC,磨损失重为0.27g。熔覆金属的磨损机制主要为磨粒磨损,材料的去除过程为显微切削与犁沟。

    Abstract:

    The failure of mechanical parts is mainly caused by three types of reasons: wear, corrosion, and fatigue. Among these three failure modes, wear and tear of mechanical components notably increase energy consumption and lead to substantial economic losses. Preparation of Fe-Cr-C-B-Ti-Y wear resistant cladding metals by plasma cladding method. The wear performance of cladding metals was analyzed using the MLS-23 rubber wheel wet sand wear tester. XRD, SEM, EBSD, and TEM were employed to examine the phase composition and microstructure of the cladding metals, followed by a discussion on the cladding metals strengthening and wear mechanisms. The results indicate that the microstructure of Fe-Cr-C-B-Ti-Y cladding metals is composed of austenite γ-Fe+M23(C,B)6 eutectic carbide+TiC hard phase. As the amount of Y2O3 added increases, the hardness and wear of the deposited metal show a trend of first increasing and then decreasing. When the Y2O3 content is 0.4%, the precipitation of TiC hard phase and M23(C,B)6 type eutectic carbides reaches its maximum, and the grain size in the microstructure is the smallest. The forming performance of the cladding metal is the best, and the wetting angle is the smallest, only 52.2 °. At this point, the rockwell hardness value of the cladding metal is 89.7 HRC, and the wear weight loss is 0.27g. The wear mechanism of cladding metals is mainly abrasive wear, and the material removal process involves micro cutting and plowing.

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郭建波,刘政军,苏允海. Y含量对Fe-Cr-C-B-Ti熔覆金属成型性及摩擦磨损性能影响[J].稀有金属材料与工程,,().[Jianbo Guo, Zhengjun Liu, suyunhai. The influence of Y content on the formability and friction wear of Fe-Cr-C-B-Ti cladding metals[J]. Rare Metal Materials and Engineering,,().]
DOI:10.12442/j. issn.1002-185X.20240458

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  • 收稿日期:2024-07-25
  • 最后修改日期:2024-10-13
  • 录用日期:2024-10-18
  • 在线发布日期: 2024-11-21
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