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本文采用真空电弧镀技术(AIP)在K465镍基高温合金基体上沉积了AlYSi(HY7)沉积-扩散型涂层,分析了涂层的组织结构及显微硬度,研究了涂层在1100℃的高温氧化行为和900℃下的燃气热腐蚀行为。通过扫描电镜(SEM)分析氧化前后试样的显微形貌,用X-射线衍射仪(XRD)分析涂层的相结构。试验结果表明,涂层主要由β-NiAl相组成,截面显微硬度自外向内呈中-高-低分布,涂层显著提高了叶片材料的抗高温氧化、抗腐蚀性能。
In this paper, AlYSi (HY7) deposition-diffusion coating was deposited on K465 nickel base superalloy substrate by vacuum arc plating (AIP). The microstructure and microhardness of the coating were analyzed. High Temperature Oxidation Behavior and Gas Corrosion at 900 ℃. The microstructure of the samples before and after oxidation was analyzed by scanning electron microscopy (SEM) and the phase structure of the coating was analyzed by X-ray diffraction (XRD). The experimental results show that the coating is mainly composed of β-NiAl phase, the microhardness of the cross section is medium-high-low distribution from outside to inside, and the coating significantly improves the high temperature oxidation and corrosion resistance of the material.