【摘要】 采用大气等离子喷涂技术在1Cr18Ni9Ti钢基体上制备了Fe-Ni-B涂层,并对涂层进行了重熔处理。采用扫描电子显微镜(SEM)、X射线荧光光谱仪(EDX)对重熔前后涂层的显微组织及界面结构进行了微观分析,并对重熔前后涂层的显微硬度、热疲劳性能、结合强度进行了试验研究。结果表明,重熔处理对涂层显微结构有明显改善,涂层更为致密。涂层与基体界面处已发生相互扩散并有新相生成,涂层热疲劳性能更好,结合强度也有所提高。更多还原

【Abstract】 Air plasma spray technique was used to prepare Fe-Ni-B coating on 1Cr18Ni9Ti stain steel substrate and the Fe-Ni-B coating was re-melted.The microstructure of Fe-Ni-B coating and interface con-figuration before remelting was analyzed using SEM and EDX apparatus.The micro hardness,thermal shocking performance,adhesion strength between coating and substrate was also studied.The results indi-cated that after the remelting,the coating microstructure became more compact,and diffusion and new ingre-dients appeared between the interfaces of coating and substrate,so the thermal shocking performance was improved.The adhesion strength between Fe-Ni-B coating and 1Cr18Ni9Ti stain steel substrate is 36.3MPa and micro hardness distributes at 470~570HV0.2.The micro hardness of substrate near the coating is higher than that of the farside because of the thermal influence of spraying particles,however,the micro hardness of interface is relative low.更多还原