利用HVAF超音速火焰喷涂技术制备了Fe40Cr23Mo14C15B6Y2非晶合金涂层。并将涂层在550、600、665、716、760、811 ℃这6个温度下进行真空热处理。采用X射线衍射仪、差热分析仪、场发射扫描电子显微镜、显微维氏硬度仪、动态极化曲线对涂层进行结构和性能的研究。通过与原始状态下涂层进行对比发现，热处理后涂层会析出Fe、Cr、Mo的碳化物，使得涂层硬度明显升高，而同时也产生贫铬区和孔洞，使得涂层耐腐蚀性能降低。
Abstract
Fe- based amorphous alloy coatings (Fe40Cr23Mo14C15B6Y2) were deposited by high- velocity air fuel technology. The as- sprayed coatings were heat treated under 550、600、665、716、760、811 ℃, respectively. XRD, DSC, SEM, Vickers Indenter and Electrochemical measurements were used for the investigation on structure and properties of coatings. Compared to the as- sprayed coating, precipitate composed of (Fe, Cr, Mo)- carbide was observed in heat treated coatings, which lead to the increase of hardness and decrease of corrosion resistance.
关键词
Fe基非晶涂层 /
热处理 /
晶化相 /
耐腐蚀性能 /
硬度
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Key words
Fe-based amorphous coating /
heat treatment /
precipitate /
corrosion resistance /
hardness
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参考文献
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脚注
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基金
国家自然科学基金项目;国家自然科学基金项目;上海市自然科学基金项目
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