Influence of Nano-Y2O3 on Wear Resistance of Hypereutectic Fe–Cr–C Hardfacing Coating

Abstract

The aim of this study was the investigation of the effect of different Y 2 O 3 additives on wear resistance of the hypereutectic Fe-Cr-C hardfacing coatings. The microstructures were observed by optical microscopy, field emission scanning electron microscopy and transmission electron microscopy, respectively. Meanwhile, the hardness was measured and the wear resistance was evaluated. Finally, the role of Y 2 O 3 was discussed. The microstructures of the coatings consist of the primary (Cr, Fe) 7 C 3 carbide and eutectic structure [austenite ? (Cr, Fe) 7 C 3 carbide]. Moreover, Y 2 O 3 can refine the M 7 C 3 carbide and improve the wear resistance of coatings obviously. Y 2 O 3 can absorb at the surface of the M 7 C 3 carbide and improve the wear resistance of the hypereutectic Fe-Cr-C hardfacing coatings.

Micro-properties of (Nb,M)C carbide (M= V, Mo, W and Cr) and precipitation behavior of (Nb,V)C in carbide reinforced coating

“…The flux-cored wires were deposited on Q235 low-carbon steel plates. The details of hardfacing process and flux-cored wire manufacturing were based on our previous work [25]. The compositions of the coatings with 0.66 wt% V addition are listed in Table 1.…”

Microstructure and wear resistance of (Nb,Ti)C carbide reinforced Fe matrix coating with different Ti contents and interfacial properties of (Nb,Ti)C/α-Fe

“…The flux-cored wire was covered by low-carbon steel strip of H08A, with graphite,ferrochromium, ferrovanadium, ferrotitanium, ferromanganese, ferroniobium and ferrosilicon powder in it. The details of fluxcored wire manufacturing and hardfacing process were based on our previous work [22]. The compositions of the coatings with different Ti contents were test by Advant/P-381 spectrograph and CS-8800 sulfur carbon analyzer, and the compositions are listed in Table 1.…”

Heterogeneous nuclei effect of MgAl2O4 on NbC in Fe matrix MMC coating

“…The core of flux-cored wire was made of graphite, ferrochromium, ferrovanadium, ferromanganese, ferrosilicon and ferroniobium powder, and it was covered by low carbon steel strip of H08A. The details of flux-cored wire manufacturing and hardfacing process were based on our previous work [14]. The compositions of the coatings with and without AlMg (50%Al and 50% Mg) powder are listed in Table 1.…”