Effect of Vanadium on Hardness and Impact Energy of As-Cast Silicon Manganese Steel
Keywords:
Silicon manganese steel, Hardness, Impact energy, VanadiumAbstract
This research studied the effect of vanadium (V) on hardness and impact energy of the silicon manganese steel composition 0.59 - 0.71 wt% C, 1.71 - 1.86 wt% Si and 0.83 - 0.92 wt% Mn. Sample were cast by sand casting. The amount of vanadium was approximately of 0.002 to 0.296 wt% V. Microstructure, Brinell hardness and Charpy impact energy of the as cast specimens were investigated. The results showed that microstructure of all specimens exhibited mostly pearlite even though the steel was hypoeutectoid (carbon atom less than 0.76 wt%). A small amount of retained austenite was also found by X-rays. Pearlite grain size decreased with increase of amount of vanadium content. Hardness of the specimens also increased with increasing vanadium. The maximum hardness value of 309 HB was obtained from a specimen with 0.296% V. However, the impact energy was found not affected by the variation of small amount of vanadium. The highest value of impact energy was 11.92 J/cm2 obtained from specimens contains 0.08 and 0.26% V.
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