爆炸喷涂氧燃比对铁基非晶涂层性能的影响
Effect of Oxygen to Fuel Ratio by Explosive Spraying on Properties of Iron-based Amorphous Coatings
- 2026年56卷第2期 页码:73-82
收稿:2024-12-29,
修回:2025-04-21,
纸质出版:2026-02-20
DOI: 10.7512/j.issn.1001-2303.2026.02.08
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收稿:2024-12-29,
修回:2025-04-21,
纸质出版:2026-02-20
移动端阅览
为优化爆炸喷涂铁基非晶涂层的综合性能,以FeCrMoCBSi非晶粉末为原料,采用爆炸喷涂技术,通过改变氧燃比参数(2.4,2,1.7,1.5)在316L不锈钢基板上沉积了铁基非晶涂层。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、维氏显微硬度计、球盘式摩擦磨损试验机和电化学工作站等测试方法,系统探究了氧燃比对涂层显微组织、非晶相含量、力学性能、耐磨性及耐蚀性的影响。结果表明:随着氧燃比的降低,涂层的非晶相含量先增后降,孔隙率和表面粗糙度先降后增。氧燃比过高会降低喷涂过程中颗粒的熔化程度,增加孔隙率;氧燃比过低会导致粒子飞行速率低,从而涂层致密性和力学性能下降,颗粒发生氧化并积聚热量,涂层易晶化;当氧燃比为1.7时,铁基非晶涂层的耐蚀性和耐磨性最好,涂层的综合性能最佳。本研究为爆炸喷涂制备铁基非晶涂层技术在海洋、机械等耐磨耐蚀领域的工程应用提供了理论支撑与技术参考。
FeCrMoCBSi powder was selected as the raw material
and iron-based amorphous coatings were deposited on 316 L stainless steel substrates using explosion spraying technology. The oxygen-fuel ratio parameters were systematically varied (2.4
2.0
1.7
1.5) to investigate their effects on the microstructure
wear resistance
and corrosion resistance of the coatings. Characterization techniques included X-ray diffraction (XRD)
scanning electron microscopy (SEM)
Vickers microhardness testing
ball-on-disk friction and wear testing
and electrochemical workstation analysis. The results indicate that as the oxygen-fuel ratio decreases
the amorphous content of the coating initially increases and subsequently decreases
while porosity and surface roughness exhibit an inverse trend. An excessively high oxygen-fuel ratio reduces the degree of particle melting during spraying
thereby increasing porosity. Conversely
an overly low oxygen-fuel ratio leads to reduced particle flight speed
resulting in decreased coating density and mechanical properties. Additionally
under such conditions
particles may become oxidized and accumulate heat
promoting crystallization of the coating. Optimal performance was achieved when the oxygen-fuel ratio was set to 1.7
at which point the iron-based amorphous coating exhibited superior corrosion and wear resistance
along with the best overall comprehensive properties.
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