Wear Resistance And Corrosion Resistance Of Fe-based Amorphous Alloy Coating Layer

Amorphous alloys are the third-generation revolutionary material after steel and plastic, it has been developed rapidly in recent years because of its excellent performance. As the major components of amorphous alloy, Fe-based amorphous alloy are widely used for its excellent wear resistance, corrosion resistance and other properties. Although Fe-based amorphous alloy has excellent performance the sizes are very small because of preparation problems, and that severely limits the application of Fe-based amorphous alloys. Thermal Spray technology as one of the major surface engineering technologies, accounted for about one-third of surface technology. The development of thermal Spray technology makes good cover of the Fe-based amorphous alloy’s shortcoming in the dimensions. High velocity oxygen fuel thermal spraying has been developed rapidly for its high coating quality in many kinds of thermal spray technology. So the study on Fe-based amorphous alloy coating becomes very important. However the processing performance of Fe-based amorphous alloy coating is not in-depth understanding, in order to get excellent work performance of coating of Fe-based amorphous alloy, we should understand Fe-based amorphous alloy coating’s processing performance and machining surface’s corrosion and resistant properties fully. This paper studies on Fe-based amorphous alloy coating’s machinability, wear resistance and corrosion resistance.Using high velocity oxygen fuel thermal spraying and plasma spraying, Fe-based amorphous alloy coatings are made on316stainless steel substrate. X-ray diffraction results show partial crystallization occurred in the process of preparation of Fe-based amorphous alloy coating by thermal spraying, coating and most of the coatings are amorphous constituents. The wear resistance of Fe-based amorphous alloy coating made by two thermal spraying methods at different speeds and loads is explored. High spraying coating compared with plasma spaying coating and substrate has a better abrasion resistance, the failure of high velocity oxygen fuel thermal spraying coating is fatigue wear and abrasive wear and the failure of the plasma spraying coating is abrasive-wear.Prepare the Fe-based amorphous alloy coating using high velocity oxygen fuel thermal spraying, Fe-based amorphous alloy coating was grinded by CNC Grinder using orthogonal test and the grinded surface has better surface roughness.Then research on the wear and electrochemical characteristic of the16sets of specimens are conducted separately. The effects of grinding depth on Ra is greater than the effects of Feed on Ra, the effects of Feed on Ra is greater than the effects of grinding speed on Ra, The effects of Feed on wear resistance is greater than the effects of grinding depth on wear resistance, the effects of grinding depth on wear resistance is greater than the effects of grinding speed on wear resistance. The effects of grinding depth on corrosion resistance is greater than the effects of Feed on corrosion resistance, the effects of Feed on corrosion resistance is greater than the effects of grinding speed on corrosion resistance.Through the study of the workability, wear resistance and corrosion resistance of Fe-based amorphous alloy coating, this paper could improve the processing quality of Fe base amorphous alloy coating and support to promote the popularization and application of Fe-based amorphous alloys technically.