铝基非晶纳米晶复合涂层的喷涂工艺

发布时间：2018-06-24 14:35

本文选题：高速电弧喷涂 + 铝基非晶纳米晶　；参考：《中国表面工程》2015年06期

【摘要】：为了研究喷涂参数对涂层性能的影响规律,采用高速电弧喷涂技术制备铝基非晶纳米晶复合涂层,利用正交试验法系统研究喷涂电流、喷涂电压、喷涂距离、喷枪移动速度和雾化空气压力对涂层性能的影响规律。优化后的工艺参数为喷涂电流160A,喷涂电压36V,喷涂距离200mm,喷枪移动速度300mm/s,雾化空气压力0.7 MPa,喷涂参数对涂层性能影响的主次顺序为:雾化空气压力、喷涂电压、喷枪移动速度、喷涂电流和喷涂距离。采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)和透射电镜(TEM)对工艺优化后的涂层进行分析,同时对涂层的显微硬度和孔隙率进行了测试。结果表明,采用优化参数制备的涂层组织结构致密,孔隙率为1.13%,硬度可达392HV0.1,涂层具有明显的非晶纳米晶相,非晶含量约为24.2%。
[Abstract]:In order to study the effect of spraying parameters on the properties of the coating, aluminum based amorphous nanocrystalline composite coatings were prepared by high speed arc spraying technology. The spraying current, spraying voltage and spraying distance were studied by orthogonal test. The influence of spray gun moving speed and atomizing air pressure on the coating performance. The optimized process parameters are spraying current 160 A, spraying voltage 36 V, spraying distance 200 mm, gun moving speed 300 mm / s, atomizing air pressure 0.7 MPA. The order of influence of spray parameters on coating performance is: atomization air pressure, spray voltage, spray gun moving speed. Spray current and spray distance. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the optimized coating. The microhardness and porosity of the coating were also measured. The results show that the coating prepared by the optimized parameters has dense microstructure, porosity of 1.13 and hardness of 392HV0.1. The coating has obvious amorphous nanocrystalline phase, and the amorphous content is about 24.2%.
【作者单位】：装甲兵工程学院机械产品再制造国家工程研究中心;
【基金】：国家自然科学基金(51375492) 教育部新世纪优秀人才支持计划(NCET-13-1068)
【分类号】：TG174.442

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