超音速火焰喷涂铁基非晶涂层的微观组织及性能

Microstructure and Properties of Fe-based Amorphous Coating Prepared by High Velocity Spraying

为增强海洋工程装备中关键部件的耐磨与抗腐蚀性能,采用超音速火焰喷涂(HVOF)技术在不锈钢基体表面喷涂Fe基非晶涂层。利用SEM、XRD和DSC等,对该涂层的微观组织、相结构及性能进行了分析。研究了喷涂中煤油流量、氧气流量、喷距对非晶涂层微观组织和性能的影响。结果表明,超音速火焰喷涂制备的铁基非晶涂层组织结构均匀致密,呈完全非晶态结构。喷涂工艺参数对涂层的显微硬度具有重要影响,在优化工艺参数下获得的显微硬度为912.1 HV0.3。不锈钢喷涂非晶涂层后耐磨性提高。

To enhance the wear resistant and corrosion resistant of key component in oceaneering equipment, Fe-based amorphous coating on stainless matrix surface was sprayed by adopting high velocity oxygen flame technology. Using SEM, XRD and DSC, the microstructure, phase change and properties of the coating were analyzed. The effects of kerosene flow, oxygen flow and spraying distance in spraying on the microstructure and properties of the amorphous coating were studied. The results show that amorphous Fe-based coating prepared by HVOF manifests a compact microstrueture and it presents a complete amorphous structure. Spraying technological parameters have a significant effect on the hardness of the coating, and under optimal process parameters, the microhardness is approximately 912.1 HV0.3. The wear resistance of the stainless steel after spraying amorphous coating increases.