期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
期号：ICMEET
页码：295
出版社：S&S Publications
摘要：This paper discusses about a new amorphous coating of FeCrB (composition of 59%Fe-26%B-15%Cr inwt %) that was done on medium carbon steel substrate (AISI 4340), by means of High Velocity Oxy-Fuel (HVOF)thermal spray. A variety of tests were performed to assess the quality of the coating obtained: The microstructurecharacteristics of powder and coating were investigated using Scanning Electron microscopy (SEM) coupled withEnergy Dispersive Spectroscopy (EDS) and optical microscopy. The initial phase contents of powder and coatings werestudied by X- ray diffraction (XRD). The microscopy studies showed that the coatings contained unmelted particles;moreover, oxides and micro-cracks were observed at the surface. The mechanical property of the coatings wascharacterized using micro hardness test. The test results showed that the coating has increased the hardness three timesgreater than the substrate. The coated surface showed lower level of porosity. All the above results reveal that thecoated region shows better surface properties than the substrate.
关键词：Fe based amorphous coating; HVOF; Microstructure
