胡宁, 樊自拴. 铸铁喷涂渗铝工艺和性能[J]. 工程科学学报, 2017, 39(6): 889-895. DOI: 10.13374/j.issn2095-9389.2017.06.011
引用本文: 胡宁, 樊自拴. 铸铁喷涂渗铝工艺和性能[J]. 工程科学学报, 2017, 39(6): 889-895. DOI: 10.13374/j.issn2095-9389.2017.06.011
HU Ning, FAN Zi-shuan. Process and properties of spray-aluminized coating on cast iron[J]. Chinese Journal of Engineering, 2017, 39(6): 889-895. DOI: 10.13374/j.issn2095-9389.2017.06.011
Citation: HU Ning, FAN Zi-shuan. Process and properties of spray-aluminized coating on cast iron[J]. Chinese Journal of Engineering, 2017, 39(6): 889-895. DOI: 10.13374/j.issn2095-9389.2017.06.011

铸铁喷涂渗铝工艺和性能

Process and properties of spray-aluminized coating on cast iron

  • 摘要: 采用线材火焰喷涂制备铝基涂层,随后对涂层进行重熔和扩散处理.利用扫描电镜、X射线衍射仪、能谱仪、摩擦磨损实验仪等对涂层的成分、物相、耐高温氧化性能、耐蚀性能等进行分析测试.结果表明:涂层分为两层,外层的物相主要是Al、FeAl3、内层是Fe2 Al5和少量的FeAl3;显微硬度有了很大程度的提高,峰值可达HV 950;渗铝试样在800、900℃进行高温氧化实验几乎不增重,抗氧化性能较铸铁可提升几十倍;同时试样也兼具良好的耐摩擦磨损和耐腐蚀性能.

     

    Abstract: Aluminum-based coatings were prepared by flame spraying. After remelting and diffusion treatment, the phase, composition, friction and corrosion resistance were analyzed experimentally by using scanning electron microscopy, X-ray diffraction, energy dispersive spectrometer, wear tester. The results indicate that the surface phase consists of Al and FeAl3, inner layer phase mainly contains FeAl 3 and Fe2 Al5. The coating has higher micro-hardness than the underlying material, with a maximum of up to HV 950. In an experiment of high-temperature oxidation at 800℃ and 900℃, the spray-aluminized samples show almost no weight gain, and the antioxidant properties of cast iron improve substantially (by dozens of times). In addition, the samples show excellent wear and corrosion resistance.

     

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