Microstructure and Properties of Ni-TiCN Composite Coatings on Ti-6Al-4V Substrate by Laser Cladding

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2025-03-26 DOI:10.1007/s11666-025-01966-w

Yu Liu, Lin Zhu, Xiaofu Liu, Lai Jiang, Guohui Li, Yali Gao, Zhitao Zhang

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引用次数: 0

Abstract

Some new Ni-based composite coatings with different amount of TiCN particles were prepared on the surface of Ti-6Al-4V (TC4) substrate by laser cladding. The microstructure and phases were obtained by scanning electron microscopy, energy-dispersive spectrometer and x-ray diffractometer. The microhardness and wear resistance were also tested by Vickers hardness tester and friction and wear tester. The results showed that all coatings had a good metallurgical bonding with TC4 substrate. Some new phases appeared in coating, such as Ti, Ti₂Ni, TiCN, TiC, TiN, Cr₂Ti and TiAl₃. The microstructure was mainly composed of block crystals and dendrites. When the amount of TiCN was 15% and 20%, spherical crystals appeared in coating. The values of average microhardness were 885.1, 890.6, 923.2, 973.7 and 943.1 HV_0.2, respectively. And the wear volumes were 0.39, 0.13, 0.12, 0.09 and 0.44 mm³, respectively. When the amount of TiCN was 15%, the coating had the maximum average microhardness due to the appearance of TiC, TiN and Ti₂Ni phases. It also had the best wear resistance. It can be seen that the average microhardness and wear resistance were improved obviously due to the addition of TiCN particles.

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激光熔覆Ti-6Al-4V基板Ni-TiCN复合涂层的组织与性能

采用激光熔覆的方法在Ti-6Al-4V （TC4）基体表面制备了不同数量的TiCN颗粒的新型ni基复合镀层。采用扫描电镜、能谱仪和x射线衍射仪对其微观结构和物相进行了表征。并用维氏硬度计和摩擦磨损试验机测试了合金的显微硬度和耐磨性。结果表明，各涂层均与TC4基体有良好的冶金结合。涂层中出现了Ti、Ti2Ni、TiCN、TiC、TiN、Cr2Ti和TiAl3等新相。显微组织主要由块状晶体和枝晶组成。当TiCN添加量为15%和20%时，涂层中出现球形晶体。平均显微硬度分别为885.1、890.6、923.2、973.7和943.1 HV0.2。磨损量分别为0.39、0.13、0.12、0.09和0.44 mm3。当TiCN用量为15%时，由于TiC、TiN和Ti2Ni相的出现，涂层的平均显微硬度最大。它也有最好的耐磨性。可以看出，TiCN颗粒的加入明显提高了合金的平均显微硬度和耐磨性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.