论文部分内容阅读
以钛铁粉、铁粉和蔗糖(碳的前驱体)为原料,采用前驱体热分解复合技术制备了Fe-Ti-C系反应热喷涂粉末,并通过普通等离子喷涂技术原位合成并沉积了TiC/Fe金属陶瓷复合涂层.利用XRD、SEM和EDS研究了喷涂粉末和复合涂层的相组成和显微结构.结果表明:前驱体热分解复合技术制备的Fe-Ti-C反应喷涂粉末粒径均匀,原料粉末颗粒间的结合强度高;所制备的TiC/Fe复合涂层主要由不同含量TiC颗粒分布于金属Fe基体内部而形成的复合片层叠加而成;TiC颗粒大致呈球形,粒径呈纳米级;TiC理论质量分数53%的TiC/Fe金属陶瓷涂层的耐磨粒磨损性能较好,SRV磨损实验中涂层的磨损面积为基体(45钢)的1/25左右.
The Fe-Ti-C reaction thermal spray powder was prepared by thermal decomposition of precursors using titanium-iron powder, iron powder and sucrose (precursor of carbon) as raw materials, and was synthesized and deposited in situ by the common plasma spray technique TiC / Fe cermet composite coating.The phase composition and microstructure of the sprayed coating and the composite coating were studied by XRD, SEM and EDS.The results show that the Fe-Ti-C reaction spray powder prepared by the precursor thermal decomposition composite technology The particle size is uniform and the bonding strength between the raw powder particles is high; the prepared TiC / Fe composite coating is mainly composed of composite sheets with different content of TiC particles distributed in the metal Fe matrix; the TiC particles are roughly spherical, The grain size is nanometer. The wear resistance of TiC / Fe cermet coating with 53% TiC content is better, and the wear area of SRV wear test is about 1/25 of the substrate (45 steel).