Effect of Alloying Method on Microstructure and Wear Resistance of Fe-Cr-V-B Based Alloy

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• 作者：Yu MA ^{masaiting23@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Ying LIU ; ^{liuying5536@163.com" class="auth_mail" title="E-mail the corresponding author} ; Jun LI ; Hui ZHANG ; Hao YANG
• 关键词：microstructure ; boride ; carbide ; wear resistance ; Fe-Cr-V-B based alloy
• 刊名：Journal of Iron and Steel Research, International
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：23
• 期：6
• 页码：625-632
• 全文大小：2584 K

文摘

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 8.6 mass% V was composed of class="boldFont">α-(Fe, Cr) solid solution, VC carbides, and V₃B₄ borides, whereas the as-cast alloy containing 24.8 mass% Cr was composed of α-(Fe, Cr) solid solution and V₃B₄, borides; the eutectic V₃B₄, 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 8.6 mass% V after destabilization heat treatment in a conventional furnace at 1373 K for 2 h was about six times higher than that of the high chromium (19 mass%) cast iron.