Frictional wear of arc sprayed coatings containing iron-based amorphous phase

Amorphous Fe-(Cr,Ni)-(C,B) coatings were prepared on low carbon steel by arc spraying technology.The phase composition,microstructure,properties of thermal stability and behavior of frictional wear were studied and analyzed by X-ray diffraction instrument(XRD),scanning electronic microscope(SEM),differential thermal analyzer and MRH-3 friction wear testing machine,respectively.The results showed that the coating had a high content of amorphous phase,layered distribution and a dense and uniform structure.The crystallization process in the coating would not occur at the temperature below 500 ℃.The coating possessed high hardness and excellent friction and wear properties,with the average hardness of 1 155 HV0.1.At the same experimental conditions,the relative wear-resistance property of the coating was 13.3 times of the one of Q235 steel,the wear mechanism was mainly dominated by fatigue wear.