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The microstructure and wear behavior of Fe-Cr-V-B based alloy was investigated.Each of the specimens was characterized by metallographic techniques and hardness test.Phase analysis of alloy was performed by X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).The results showed that the microstructure of Fe-Cr-V-B based as-cast alloy containing 8.6mass% V was composed ofα-(Fe,Cr)solid solution,VC carbides,and V_3B_4 borides,whereas the as-cast alloy containing 24.8mass% Cr was composed ofα-(Fe,Cr)solid solution and V_3B_4borides;the eutectic V_3B_4 borides mainly comprise M2B-type borides(M presents Fe and Cr).The existence of a large amount of V atoms affects the growth pattern of eutectic borides,which mainly display rod-like and grainy structure.The wear behavior of the experimental alloy has been investigated using pin-on-disk type friction and wear apparatus.The comparison of experimental results indicated that the relative wear resistance of the alloy containing 8.6mass% V after destabilization heat treatment in a conventional furnace at 1 373 K for 2hwas about six times higher than that of the high chromium(19mass%)cast iron.
The microstructure and wear behavior of Fe-Cr-VB based alloys was investigated. Since the specimens were characterized by metallographic techniques and hardness test. Phase analysis of alloy was performed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the microstructure of Fe-Cr-VB based as-cast alloy containing 8.6mass% V was composed ofα- (Fe, Cr) solid solution, VC carbides, and V_3B_4 borides, the as-cast alloy containing 24.8mass% Cr was composed ofα- (Fe, Cr) solid solution and V_3B_4borides; the eutectic V_3B_4 borides primarily comprise M2B-type borides (M presents Fe and Cr) atoms affects the growth pattern of eutectic borides, which mainly display rod-like and grainy structure. wear behavior of the experimental alloy has been investigated using pin-on-disk type friction and wear apparatus.The comparison of experimental results indicates that the relative wear resista nce of the alloy containing 8.6 mass% V after destabilization heat treatment in a conventional furnace at 1 373 K for 2hwas about six times higher than that of the high chromium (19mass%) cast iron.