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采用工业纯钛粉,利用反应等离子喷涂技术,在45钢表面原位合成TiN复相涂层。利用X射线衍射仪分析了涂层的物相组成,采用扫描电镜观察涂层的组织结构、显微压痕、断口和磨损形貌,采用能谱仪分析压痕微区成分,测试了涂层的显微硬度和耐磨性能。结果表明:复相涂层由TiN、TiN0.3、Ti3O组成;涂层具有典型的层状组织结构,且层与层之间、层与基体之间结合较好;涂层的显微硬度为983~1 254 HV0.1;显微压痕形状清晰、规则,且压痕周围无翘边现象;断口形貌说明涂层具有一定的韧性,为介于陶瓷材料与韧性材料之间的混合断裂机制;涂层在低载荷时耐磨性能最佳。
The use of industrial pure titanium powder, the use of reactive plasma spray technology, in-situ synthesis of 45 steel surface TiN composite coating. The phase composition of the coating was analyzed by X-ray diffractometer. The microstructure, microindentation, fracture and wear morphology of the coating were observed by scanning electron microscopy. The composition of indentation micro-area was analyzed by energy dispersive spectroscopy. The microhardness and wear resistance. The results show that the composite coating consists of TiN, TiN0.3 and Ti3O. The coating has a typical layered structure with better bonding between the layers and the matrix. The microhardness of the coating is 983 ~ 1 254 HV0.1; The shape of micro-indentation is clear and regular, and there is no warp around the indentation. The fracture morphology shows that the coating has a certain toughness, which is a mixed fracture between the ceramic material and the ductile material Mechanics; coatings have the best wear resistance at low loads.