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。
Air plasma spray technique was used to prepare Fe-Ni-B coating on 1Crl8Ni9Ti stain steel substrate and the Fe-Ni-B coating was re-melted. The microstructure of Fe-Ni-B coating and interface configuration 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 indicated that after the remelting, the coating microstructure became more compact, and diffusion and new ingredients appeared between the interfaces of coating and substrate, so the thermal shocking performance was improved. The adhesion strength between Fe-Ni-B coating and 1Crl 8Ni9Ti 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.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2007年第4期72-75,共4页
Nuclear Power Engineering
