( 1. 北京科技大學 材料科學與工程學院 ， 北京 100083；
2. 哈爾濱工業(yè)大學 現代焊接技術生產國家重點實驗室， 哈爾濱 150001)
摘 要: 以TiFe粉和碳的前驅體（石油瀝青）為原料， 通過碳化制備Ti-Fe-C系反應噴涂復合粉末， 并通過普通火焰噴涂技術成功制備了TiC/Fe金屬陶瓷復合涂層； 采用XRD、 SEM和EDS對噴涂粉末和涂層的成分、 組織結構進行了分析， 同時對涂層耐磨性能進行了對比研究。結果表明： 采用前驅體碳化復合技術制備的Ti-Fe-C系復合噴涂粉末粒度均勻、無有害相生成； 噴涂所得到的TiC/Fe金屬陶瓷復合涂層由片狀的鐵基體和彌散分布的TiC顆粒組成； TiC顆粒大致呈球形， 粒度一般在0.5μm以下； 相同條件下所獲涂層的磨損體積大約是常規(guī)火焰噴涂Ni60涂層的1/5。
關鍵字: 反應火焰噴涂; TiC/Fe; 前驅體; 復合涂層
（ 1. School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory of Advanced Welding Production Technology,
Harbin Institute of Technology, Harbin 150001, China ）
Abstract: A kind of Ti-Fe-C composite powder for reactive spray using ferrotitanium and asphalt as raw materials was prepared. TiC/Fe composite coatings were synthesized and deposited by reactive flame spray(RFS). The composition and microstructure of these composite powder and coatings were employed to analyze by XRD, SEM and EDS. The wear resistance properties of the coatings were also tested. The results show that the particle of Ti-Fe-C composites powder for RFS is uniform without any impurity. The TiC/Fe composite coatings by RFS are composed of layers in which the round TiC particles are dispersed within the Fe-alloy matrix. The round TiC particle size are mostly less than 0.5μm. The wearing capacity of Ni60 coating is five times than that of the TiC/Fe composite coatings.
Key words: reactive flame spray; TiC/Fe; precursor; composite coatings
