电热爆炸定向喷涂法制备钼涂层

Experimental Study on Preparation of Molybdenum Coating Produced by Electrothermal Explosion Directional Spray

摘要:

运用电热爆炸定向喷涂新方法在45#钢基体上制备了钼涂层。借助扫描电镜以及能谱仪对涂层的组织结构、形貌以及涂层成分进行了分析。借助显微硬度测试仪对涂层硬度进行了测试。利用图像分析软件对涂层的晶粒尺寸进行了测量。实验表明：涂层组织晶粒细小，涂层硬度提高，HV值最大到达14110MPa，为原始硬度的3倍，且涂层致密，孔隙率低。能谱分析表明，喷涂过程没有发生氧化现象。

Abstract:

Molybdenum Coating was sprayed on 45 steel substrate using novel electrothermal explosion directional spray. Microstructure and composition of the coating were analyzed with SEM and EDS, respectively. Hardness of the coating was tested by hardness testing machine. Grain sizes of Mo coating were measured. It shows that the grain of molybdenum coating is very fine. The maximum hardness of the coating is up to HV=1411, 3 times of the sprayed molybdenum material. The coating is dense and the porosity is little. EDS shows that oxidation do not occur during the spraying process.