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    田鹿岩, 李新梅, 刘伟斌. CeO2添加量对激光熔覆TiB2-TiC/Ni复合涂层组织和性能的影响[J]. 机械工程材料, 2023, 47(9): 82-86,93. DOI: 10.11973/jxgccl202309014
    引用本文: 田鹿岩, 李新梅, 刘伟斌. CeO2添加量对激光熔覆TiB2-TiC/Ni复合涂层组织和性能的影响[J]. 机械工程材料, 2023, 47(9): 82-86,93. DOI: 10.11973/jxgccl202309014
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    TIAN Luyan, LI Xinmei, LIU Weibin. Effect of CeO2 Addition Amount on Microstructure and Properties ofLaser Cladded TiB2-TiC/Ni Composite Coating[J]. Materials and Mechanical Engineering, 2023, 47(9): 82-86,93. DOI: 10.11973/jxgccl202309014
    Citation: TIAN Luyan, LI Xinmei, LIU Weibin. Effect of CeO2 Addition Amount on Microstructure and Properties ofLaser Cladded TiB2-TiC/Ni Composite Coating[J]. Materials and Mechanical Engineering, 2023, 47(9): 82-86,93. DOI: 10.11973/jxgccl202309014
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    CeO2添加量对激光熔覆TiB2-TiC/Ni复合涂层组织和性能的影响

    Effect of CeO2 Addition Amount on Microstructure and Properties ofLaser Cladded TiB2-TiC/Ni Composite Coating

      摘要
    • 摘要: 利用激光熔覆技术在TC4钛合金表面制备了添加质量分数1.0%，1.5%，2.0% CeO2的TiB2-TiC/Ni复合涂层，研究了复合涂层的物相组成、显微组织和硬度，讨论了搭接率（30%，40%，50%）对最佳CeO2含量条件下复合涂层试样摩擦磨损性能的影响。结果表明：复合涂层均由TiB2、TiB、α-Ti、TiC、Ni3Ti、Cr23C6、Ti2Ni、Cr3C2、γ-Ni等相组成；添加质量分数1.5% CeO2复合涂层的组织最为均匀致密，细化效果明显；随着CeO2添加量的增加，复合涂层的硬度先增后降，添加质量分数1.5% CeO2复合涂层的硬度最高，约为1 015 HV。CeO2的最佳添加质量分数为1.5%，在此条件下随着搭接率的增加，试样的磨损质量损失先减小后增大，当搭接率为40%时，磨损质量损失最小，磨损机理为磨粒磨损。

       

      Abstract: The TiB2-TiC/Ni composite coating added with 1wt%, 1.5wt% and 2wt% CeO2 was prepared on the surface of TC4 titanium alloy by laser cladding technique. The phase composition, microstructure, and hardness of the composite coating were studied, and the effect of lapping rate (30%, 40%, 50%) on the friction and wear properties of the composite coating sample under the optimal CeO2 content condition was discussed. The results show that the composite coating consisted of TiB2, TiB, α-Ti, TiC, Ni3Ti, Cr23C6, Ti2Ni, Cr3C2 and γ-Ni phases. The microstructure of the composite coating added with 1.5wt% CeO2 was the most uniform and dense, and the refinement effect was obvious. With the increase of CeO2 addition amount, the hardness of the composite coating increased first and then decreased. The hardness of the composite coating added with 1.5wt% CeO2 was the highest of about 1 015 HV. The optimal mass fraction of CeO2 was 1.5%; under this condition, the wear mass loss of the sample decreased first and then increased with the increase of lapping rate. When the lapping rate was 40%, the wear mass loss was the smallest, and the wear mechanism was abrasive wear.

       

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