Microstructure and abrasive wear behavior of FeBC coating prepared by wire-arc spraying

FeBC coating with different boron and carbon contents were prepared by wire-arc spraying. The effect of B and C contents on the microstructures and wear resistance of coatings were analyzed by optical microscope,X-ray diffraction(XRD),scanning electron microscopy(SEM),microhardness and abrasive wear testing machine. The results indicate that there are micro-cracks and unmelted particles in the as-deposited Fe-based coatings. With the increases of B and C contents,the unmelted particles increase,the Fe₂B,Fe₂₃(C,B)₆ hard phase can improve the hardness and wear resistance of the coating significantly. In this studies,the coating with 8% boron and 0. 4% carbon has the best wear resistance,and with the increases of B and C contents,the wear resistance decreases.