Abstract：The Fe-based amorphous coatings were prepared by detonation spray at various oxygen fuel rates (oxygen flow m3/h to acetylene flow m3/h ratio). The effects of oxygen fuel rate on coating microstructure and wear properties were examined. The effects of microhardness and porosity on the wear properties are also studied. The results show, the amorphous phase contents of coatings were calculated to be 89.73%, 86.23% and 81.46%, respectively, which were higher than those fabricated by other thermal spray techniques. The porosity was tested to be 2.1%, 1.4% and 0.8%, respectively. The wear resistance of Fe-based amorphous coatings was four times better than the stainless steel substrate. The oxygen fuel rate of 1.2:1.0 was proved to be the optimal parameter of fabricating Fe-based amorphous coating. Amorphous coatings with moderate hardness and porosity have the best wear resistance, and the effect of hardness on wear resistance is greater than that of porosity.
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2019, Vol. 24 
