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采用高频感应熔覆技术在45钢表面制备了TiN增强Ni基合金涂层,利用OM、EDS、SEM和XRD分析了涂层的微观结构和化学组成;利用显微硬度计和摩擦磨损机研究了TiN添加量对涂层硬度和耐磨性的影响。结果表明:感应熔覆Ni基涂层无裂纹、气孔等缺陷出现,与基体达到了冶金结合;涂层主要为胞状树枝晶,由γ-Ni、Ni_2B、Cr_(23)C_6、CrB等构成;Ni基涂层的硬度较高,耐磨性能良好,随着涂层中TiN含量的增加,涂层的硬度增大,耐磨性增强;与不添加TiN的Ni基涂层相比,40%TiN+Ni基涂层的最大硬度值提高了37.3%,摩擦因数降低了48.3%,摩擦磨损质量损失减小了28.0%。
TiN reinforced Ni-based alloy coating was prepared on the surface of 45 steel by high frequency induction cladding technique. The microstructure and chemical composition of the coating were analyzed by OM, EDS, SEM and XRD. The microhardness tester and friction and wear tester Effect of TiN Addition on Coating Hardness and Wear Resistance. The results show that the Ni - based coating has no cracks and defects such as porosity and porosity, and metallurgical bonding with the matrix has been achieved. The coating mainly consists of dendritic dendrites, which are composed of γ-Ni, Ni_2B, Cr_ (23) C_6 and CrB. The Ni-based coating has higher hardness and better wear resistance. With the increase of TiN content in the coating, the hardness of the coating increases and the wear resistance increases. Compared with the Ni-based coating without addition of TiN, 40% The maximum hardness value of TiN + Ni-based coating increased by 37.3%, the friction coefficient decreased by 48.3% and the friction and wear loss decreased by 28.0%.