Laser cladded NiCoCrAlY–xNi60WC coatings: Microstructure and high temperature tribological properties

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2024-07-04 DOI:10.1016/j.intermet.2024.108399

Pan Han, Kong Dejun

引用次数: 0

Abstract

In order to improve the tribological properties of alloy coatings, the Ni60WC was added into the NiCoCrAlY coating by laser cladding. The effects of Ni60WC mass fraction on the coefficients of friction and wear rates of NiCoCrAlY–xNi60WC coatings at 500 °C were investigated using a ball–on–disc wear tester, and the wear mechanism of WC in the wear process was also discussed. The results show that the average coefficients of friction of NiCoCrAlY–15 %, −30 %, and −45%Ni60WC coatings in the stable wear period are reduced by 8.8 %, 14.7 %, and 20.6 %, respectively, compared with the NiCoCrAlY–0%Ni60WC coating, and the corresponding wear rates are decreased by 28.5 %, 55.1 %, and 70.8 %, respectively, showing that the friction reduction and wear resistance of NiCoCrAlY–xNi60WC coatings are increased with the Ni60WC mass fraction. The wear mechanism is adhesive wear and oxidative wear, which is attributed to the hardness improvement of NiCoCrAlY–xNi60WC coating by the addition of Ni60WC.

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激光熔覆 NiCoCrAlY-xNi60WC 涂层：微观结构和高温摩擦学特性

为了改善合金涂层的摩擦学性能，通过激光熔覆将 Ni60WC 添加到 NiCoCrAlY 涂层中。使用球盘磨损试验机研究了 Ni60WC 质量分数对 NiCoCrAlY-xNi60WC 涂层在 500 °C 下摩擦系数和磨损率的影响，并讨论了磨损过程中 WC 的磨损机理。结果表明，在稳定磨损期，NiCoCrAlY-15 %、-30 % 和 -45 %Ni60WC 涂层的平均摩擦系数分别降低了 8.8 %、14.7 % 和 20.与 NiCoCrAlY-0%Ni60WC 涂层相比，稳定磨损期 NiCoCrAlY-15 %、-30 % 和 -45 %Ni60WC 涂层的减摩性分别降低了 8.8 %、14.7 % 和 20.6 %，相应的磨损率分别降低了 28.5 %、55.1 % 和 70.8 %，表明 NiCoCrAlY-xNi60WC 涂层的减摩性和耐磨性随 Ni60WC 质量分数的增加而提高。磨损机理为粘着磨损和氧化磨损，这与添加 Ni60WC 后 NiCoCrAlY-xNi60WC 涂层的硬度提高有关。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.