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以钛铁粉、铁粉、镍粉、蔗糖为原料,通过前驱体热分解复合技术制备Fe-Ni-Ti-C系反应喷涂粉末,利用氧乙炔火焰喷涂技术原位合成并沉积了TiC/FeNi复合涂层。采用XRD、SEM和EDS观察分析了复合涂层的形态、相组成和组织结构,讨论了工艺参数对涂层组织性能的影响。研究结果表明:涂层基体为片状的Fe-Ni固溶体合金,增强相为弥散分布的TiC颗粒,TiC颗粒大致呈球形,粒度一般在0.5μm以下,少量的Ti2O3与TiC颗粒形成共生聚集区;TiC含量以及Fe的不同加入方式对涂层组织结构产生影响。经磨损试验TiC/FeNi复合涂层的磨损面积约为Ni60涂层的20%。
The Fe-Ni-Ti-C reaction powder was prepared by thermal decomposition of precursors with titanium-iron powder, iron powder, nickel powder and sucrose as raw materials. In-situ synthesis and deposition of TiC / FeNi Composite coating. The morphology, phase composition and microstructure of the composite coating were observed and analyzed by XRD, SEM and EDS. The influence of process parameters on the microstructure and properties of the coating was also discussed. The results show that the coating matrix is flaky Fe-Ni solid solution alloy, the reinforcing phase is TiC particles dispersedly distributed. The TiC particles are roughly spherical, the particle size is generally below 0.5μm, and a small amount of Ti2O3 and TiC particles form symbiotic aggregation zone. TiC content and the different addition of Fe affect the structure of the coating. The abrasion area of the TiC / FeNi composite coating after abrasion test is about 20% of the Ni60 coating.