激光熔覆铁基非晶涂层的显微组织和高温磨损性能

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materiali in tehnologije Pub Date : 2023-07-29 DOI:10.17222/mit.2023.803

Lu Xie, Yueming Wang, Jianlin Yang, Chenlong Li, Xuhang Han, Jie Huang

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引用次数: 0

摘要

采用非晶粉末在316不锈钢表面制备了FeCrMoCB非晶涂层。利用扫描电子显微镜(SEM)、能谱仪(EDS)和x射线衍射仪(XRD)分析了涂层的微观结构、成分和相结构。采用硬度仪和摩擦磨损仪对涂层的显微硬度和磨损性能进行了研究。结果表明，相对于完整的非晶粉末，激光熔覆后出现了Cr23C6、Cr15Fe7C6和Fe3Mo的晶相，采用Verdon法计算得到熔覆层的非晶相分数高达68.4%。涂层在室温下以粘着磨损为主，当磨损温度升高至600℃时，涂层转变为疲劳磨损。随着温度从RT升高到600℃，磨损率从26 × 10-6 mm3/N·m增加到79 × 10-6 mm3/N·m。激光熔覆铁基非晶态涂层的磨损性能明显优于316不锈钢，其磨损率达到钢的三分之一。

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MICROSTRUCTURE AND HIGH-TEMPERATURE WEAR BEHAVIOR OF FE-BASED AMORPHOUS COATINGS BY LASER CLADDING

FeCrMoCB amorphous coatings were prepared on 316 stainless steel via an amorphous powder. Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were used to analyze the microstructure, composition, and phase structure of the coatings. Hardness and friction wear testers were applied to investigate the microhardness and wear behavior of the coatings. Results show that the Cr23C6, Cr15Fe7C6 and Fe3Mo crystal phases appeared after laser cladding relative to the complete amorphous powder, and the amorphous phase fraction of the coating was calculated up to 68.4 % using the Verdon method. The coating exhibited a dominating adhesive wear mechanism under room temperature (RT) and transformed to a fatigue wear mechanism as wear test temperature increased to 600 °C. As the temperature was elevated from RT to 600 °C, the wear rate increased from 26 × 10–6 mm3/N·m to 79 × 10–6 mm3/N·m. The laser-cladded Fe-based amorphous coating exhibited much stronger wear performance than the 316 stainless steel, even the wear rate reached one third of that of steel.

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来源期刊

Materiali in tehnologije 工程技术-材料科学：综合

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal MATERIALI IN TEHNOLOGIJE/MATERIALS AND TECHNOLOGY is a scientific journal, devoted to original papers and review scientific papers concerned with the areas of fundamental and applied science and technology. Topics of particular interest include metallic materials, inorganic materials, polymers, vacuum technique and lately nanomaterials.