论文部分内容阅读
利用激光熔覆原位合成技术,在预置N i涂层的45钢表面原位自生碳化钨陶瓷。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、显微硬度计等分析测试手段对碳化钨陶瓷增强相的组织形貌、物相组成、化学成分及力学性能等方面进行了研究。结果表明,熔覆区内的碳化物由过饱和固溶体共晶析出;涂层与基体间的结合为冶金结合;制备的表面复合材料的硬度高于基体,改性效果极为明显。
In-Situ Synthesis of In-situ Tungsten Carbide Ceramics on Surface of 45 Steel Prepared with Ni-Co Coating by Laser Clad In Situ Synthesis. The morphology, phase composition, chemical composition and mechanical properties of WC reinforced phase were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and microhardness tester Performance and other aspects of the study. The results show that the carbides in the cladding zone are eutectically precipitated by supersaturated solid solution. The bonding between the coating and the matrix is metallurgical bonding. The hardness of the prepared surface composites is higher than that of the matrix, and the modification effect is very obvious.