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高速電弧噴涂FeAlCr涂層的組織與耐磨性研究
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國(guó)家“973”課題 (2011CB013403)；國(guó)家自然科學(xué)基金(51105377, 50971132)；國(guó)家科技支撐課題 (2011BAF11B07)


Microstructure and Wear Resistance Property of the FeAlCr Coating Prepared by High Velocity Arc Spraying
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    摘要:

    為了提高Fe-Al金屬間化合物涂層的結(jié)合強(qiáng)度和耐磨性，改善其室溫韌性，研制了一種新型FeAlCr電弧噴涂粉芯絲材，利用高速電弧噴涂技術(shù)在45#鋼基體表面制備了涂層。采用掃描電鏡（SEM）、能譜儀（EDAX）和X射線(xiàn)衍射儀分析了涂層的微觀結(jié)構(gòu)和微區(qū)成分，用顯微硬度計(jì)、拉伸試驗(yàn)機(jī)和CETR微動(dòng)摩擦磨損試驗(yàn)機(jī)等試驗(yàn)設(shè)備對(duì)涂層的力學(xué)性能進(jìn)行了分析。結(jié)果表明，噴涂FeAlCr粉芯絲材過(guò)程中合金元素反應(yīng)充分，涂層組織均勻、致密，氧化物含量極低。主要相組成有Fe-Al、Ni3Al金屬間化合物，硬質(zhì)相Cr3C2、氧化物Cr2O3和Al2O3彌散分布在韌性相α-Fe基體上。涂層平均HV顯微硬度為5.50 GPa，約是基體的2倍，平均結(jié)合強(qiáng)度約47.2 MPa，載荷100 N油潤(rùn)滑條件下涂層的耐磨性高于基體，磨損率隨著摩擦過(guò)程的進(jìn)行呈降低趨勢(shì)

    Abstract:

    Aiming to improving the bonding strength, wear resistance and room temperature toughness of the Fe-Al intermetallic coating, the FeAlCr cored wire was designed. The coatings were prepared on the 45# steel substrate by high velocity arc spraying technology. Microstructures, phase composition and wear resistance of the composite coating were investigated by SEM, XRD and CETR wear tester. The mechanical properties were tested on a tensile testing machine and a hardness tester. The results show that the composite coating is characterized by compact microstructure, low oxygen content and well bonding with the substrate. The phases of the coating are composed of α-Fe, Cr3C2, Fe-Al, Ni3Al intermetallic compound and little oxide. The adhesive strength and average hardness of the coating are 47.2 MPa and 5.5 GPa which is about 2 times of the substrate. The wear resistance of the composite coating under load of 100 N and the oil lubricating abrasion condition is higher than that of the substrate. Furthermore, while the friction time is processing, the wear rate of FeAlCr coating is being decrease

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田浩亮,魏世丞,陳永雄,童 輝,劉 毅,徐濱士.高速電弧噴涂FeAlCr涂層的組織與耐磨性研究[J].稀有金屬材料與工程,2014,43(1):135~139.[Tian Haoling, Wei Shicheng, Chen Yongxiong, Tong Hui, Liu Yi, Xu Binshi. Microstructure and Wear Resistance Property of the FeAlCr Coating Prepared by High Velocity Arc Spraying[J]. Rare Metal Materials and Engineering,2014,43(1):135~139.]
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  • 收稿日期:2013-01-15
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  • 在線(xiàn)發(fā)布日期: 2014-04-16
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