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Effects of Silicon Content on Carbides in High Vanadium High-speed Steel

Wei Dai-bin

Abstract

Aimed at a group of high vanadium high-speed steels with different composition,the effects of silicon content (0.31%～5.03%,mass fraction) on carbides were studied. The results show that the carbides are mainly granular VC and isolated carbides with molybdenum or chromium in high vanadium high-speed steel with low silicon content. The like-flower carbides starts to occur and grow up with the increase of silicon content above 2.1%. Meanwhile,the isolated carbides with molybdenum or chromium decrease. By means of EPMA and XRD,it's known that the like-flower carbides are of VC type,and molybdenum and chromium elements mainly dissolves into vanadium carbides.

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Key concepts: Carbide, Vanadium, Molybdenum, High-speed steel, Chromium, Metallurgy, Materials science, Silicon