中文摘要：

利用高速电弧喷涂快速冷却的技术优势,采用自动化高速电弧喷涂技术在45钢表面制备了AlNiFeSiB非晶纳米晶复合涂层。采用X射线衍射仪、扫描电镜、差示扫描量热仪分析了该涂层的组织与热物理性能;在3.5wt%NaCl溶液中检测了涂层的腐蚀性能。结果表明,AlNiFeSiB复合涂层具有非晶纳米晶复合结构,涂层非晶含量约为60%,孔隙率约为2.2%,涂层的玻璃转变温度（Tg）为409℃,开始晶化温度（Tx）为457℃;涂层的自腐蚀电位约为-553.7mV,腐蚀电流密度约为0.52μA/cm~2。

英文摘要：

AlNiFeSiB amorphous and nanocrystalline composite coating was prepared on the surface of 45 steel by automatic high velocity arc spraying with the help of the technology advantages of high speed arc spraying rapid cooling.The microstructure and thermophysical property of the coating were analyzed by X-ray diffraction（XRD）, scanning electron microscope（SEM） and differential scanning calorimetry（DSC）, and the corrosion property of the coating in 3.5wt% NaCl solution was detected. The results show that the AlNiFeSiB coating has the composite structure of amorphous and nanocrystalline. The amorphous content of the coating is about 60%, and the porosity is about 2.2%. The glass transition temperature（Tg） of the coating is 409 ℃ and the onset crystalline temperature（Tx） of the coating is 457℃, respectively. The self corrosion potential of the coating is about-553.7 mV and the corrosion current density is about 0.52 μA/cm~2.