激光熔覆增强钼涂层铝的力学性能

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-01-02 DOI:10.1080/02670844.2023.2191400

Qiuju Zheng, Tian Chen, Hongbo Li

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引用次数: 0

摘要

摘要采用高速氧燃料喷涂、激光重熔和激光熔覆工艺，在纯铝基体上成功沉积了高质量的钼涂层。系统地研究了涂层的微观结构、结合强度、显微硬度和耐磨性。结果表明，所获得的涂层具有良好的冶金结合界面以及与Al8Mo3、AlMo3和Al5Mo相致密的微观结构，显著提高了涂层的力学性能。粘合强度从11 ± 1至57 ± 激光处理后为4MPa。涂层的显微硬度（480 ± 30HV）与喷涂涂层（281）相比增加了约70% ± 8hv）。通过激光重熔和熔覆工艺，Mo涂层的耐磨性也提高了约5至6倍。

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Enhanced mechanical properties of molybdenum-coated aluminium via laser cladding

ABSTRACT High-quality molybdenum coating has been successfully deposited on the pure aluminium substrate by high-velocity oxygen fuel spraying and subsequent laser remelting and laser cladding process. The microstructure, bonding strength, micro-hardness and wear resistance of the coating were systematically investigated. Results showed that the obtained coating exhibits a good metallurgical bonding interface as well as a dense microstructure with Al8Mo3, AlMo3 and Al5Mo phases, which results in the significant improvement of the mechanical properties of the coating. The bonding strength is increased from 11 ± 1 to 57 ± 4 MPa after laser treatment. Micro-hardness of the coating (480 ± 30 HV) is observed to be increased by about 70% in comparison with the as-sprayed coating (281 ± 8 HV). The wear resistance of the Mo coating was also increased about five to six times by the laser remelting and cladding process.

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.