Anti-wear Properties of Fe-based Amorphous and Nanocrystalline Coating

The FeCrBSiMnNbY amorphous and nanocrystalline coating is prepared by using the wire arc spraying process on the 45 steel substrate.The effect of wear parameters,such as wear time,line speed and loading,on the wear properties of Fe-based amorphous and nanocrystalline coating is studied.The microstructure of the coating is characterized by the SEM,EDAX and XRD.The mechanical properties of the coating are measured on nano-indention MM200 wear tester.The results show that the coating consists of amorphous phase and nanocrystalline α-Fe phase.The coating is fully dense with low porosity,little oxide and high micro-hardness.The amorphous and nanocrystalline coating presents an excellent wear resistance,in which the relative wear resistance is about 4.6 times higher than that of the 3Cr13 coating under the same test condition.The amorphous and nanocrystalline coating exhibits the brittle spalling failure mechanism.