(北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083)
摘 要: 以鈦鐵、石墨和純鐵粉為原料，利用反應(yīng)火焰噴涂技術(shù)成功制備了TiC-Fe金屬陶瓷涂層。研究了成分參數(shù)對(duì)涂層顯微結(jié)構(gòu)(包括顯微組織、形貌和顯微硬度)的影響。結(jié)果表明：Fe含量過低，則涂層中含有大量氧化物，使涂層自身結(jié)合強(qiáng)度顯著降低；Fe含量過高，則使涂層中富TiC片層的顯微硬度顯著降低，也造成涂層的耐磨性能顯著降低。原料中C/Ti摩爾比對(duì)涂層的顯微結(jié)構(gòu)影響不大，但適當(dāng)過量的C/Ti摩爾比會(huì)使涂層中貧TiC片層減少，從而提高涂層的耐磨性能。
關(guān)鍵字: 反應(yīng)火焰噴涂；TiC-Fe涂層；成分參數(shù)；顯微結(jié)構(gòu)
microstructure of reactive flame sprayed
TiC-Fe coating
（School of Materials Science and Engineering, University of Science and
Technology Beijing，Beijing 100083, China）
Abstract:The influence of the composition parameteron the microstructure of reactive-flame-sprayed TiC-Fe cermet coating was studied. Among all the parameters considered，F(xiàn)e content has strong influence on the microstructure. With the increase of Fe content，the amount of the oxide s in the coating obviously decreases，and the microhardness of the TiC-rich layer also decreases，resulting in the reduction of wear resistance. The C/Ti molar ratio has a little effect on the microstructure of the coating. The higher the C/Ti molar ratio in the reactive spray powders，the higher the number of the TiC0-rich layers within the coating and the better the wear resistance of the coating.
Key words: reactive flame spray; TiC-Fe coatings; composition parameter; microstructure
