高速激光熔覆 (HSLC) (CoCrNi)88Al6Ti6-cBN 复合涂层的微观结构和性能：协同提高耐磨性和减少摩擦的新策略

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-08-28 DOI:10.1016/j.triboint.2024.110175

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引用次数: 0

摘要

为了提高镍基刀片表面的耐磨性，使用 HSLC 在 GH4169 基材上制作了 (CoCrNi)88Al6Ti6-cBN 复合涂层。评估了涂层在 25 和 600 °C 下的微观结构、显微硬度和摩擦学特性。结果表明，由于沉淀强化、第二相强化和位错强化，cBN 复合涂层的硬度提高了 91.6 HV0.3。此外，涂层的抗磨损性能在 25 °C 和 600 °C 时分别提高了 3.72 倍和 3.23 倍。此外，在激光和氧化物产生的高温条件下，部分 cBN 转化为 hBN，从而显著降低了涂层的摩擦系数。

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Microstructure and performance of (CoCrNi)88Al6Ti6-cBN composite coatings by high-speed laser cladding (HSLC): A novel strategy for synergizing wear-resistance and friction reduction

To enhance the wear-resistance of nickel-based blade surfaces, a (CoCrNi)₈₈Al₆Ti₆-cBN composite coating was produced on GH4169 substrates using HSLC. The microstructure, microhardness and tribology properties of the coating at 25 and 600 °C were evaluated. The finding demonstrates that the hardness of the cBN composite coating increase by 91.6 HV_0.3 attributed to precipitation strengthening, second phase strengthening and dislocation strengthening. Furthermore, the anti-wear performance of the coating increased by 3.72 times at 25 °C and by 3.23 times at 600 °C, respectively. Additionally, the friction coefficient exhibited by the coating diminished significantly by converting a portion of the cBN to hBN under the high temperatures generated by laser and oxides generating.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.