【摘要】 为了筛选最佳的铁基非晶涂层制备工艺和研究涂层的冲蚀磨损机理,采用电弧喷涂技术在不同工艺参数下制备Fe基非晶态合金涂层,利用自制固液两相流冲蚀磨损试验机和电化学工作站对涂层的耐磨损、耐腐蚀性能进行研究;并用X射线衍射仪(XRD)、扫描电镜(SEM)等手段观察分析了涂层的相结构和组织形貌。结果表明:非晶涂层结构致密、组织均匀,并具有典型的层状结构;铁基非晶涂层具有良好的耐冲蚀性能,90°攻角下涂层冲蚀失重要高于30°攻角下涂层的失重;电弧喷涂电压上升,涂层冲蚀失重随之减小;送丝速度增加,涂层冲蚀失重先降低再升高;冲蚀磨损机制主要表现为脆性剥落;非晶涂层的耐腐蚀性能随喷涂电压的上升得到提高,随送丝速度增加先增强再减弱。更多还原

【Abstract】 In order to study the optimal coating preparation process and the erosion wear mechanism of the coating,the Fe-based amorphous alloy coating was prepared by arc spraying technology under different conditions,and the self-made solid-liquid two-phase flow erosion abrasion tester and electrochemical workstation were used to study the wear and corrosion resistance of coatings. The X-ray diffractometer( XRD) and scanning electron microscope( SEM) were employed to examine the phase structure and microstructure of the coating. Results showed that the amorphous coating had compact,uniform and typical lamellar structure. The Fe-based amorphous coating possessed good erosion resistance,and the weight loss of the coating under the attack angle of 90° was higher than that under the attack angle of 30°. With the increase of the spray voltage,the erosion loss of the coating decreased. As the wire feeding speed was improved,the weight loss of the coating firstly decreased and then increased. Furthermore,the erosive wear mechanisms were mainly brittle breaks by observing the surface morphology.The corrosion resistance of the amorphous coating increased with the increase of the spraying voltage,or ascended firstly and then descended with the increase of the wire feeding speed.更多还原