Vanadium-titanium wear resistant cast iron and preparation method thereof

The invention discloses vanadium-titanium wear resistant cast iron and a preparation method thereof. The vanadium-titanium wear resistant cast iron comprises, by weight, 2.9-3.8% of C, 1.2-2.2% of Si, 0.5-1.3% of Mn, 0.16-0.37% of V, 0.03-0.17% of Ti, no more than 0.2% of P, no more than 0.10% of S, and the balance Fe. The preparation method comprises the steps of blending, preheating, smelting, on-the-spot quick analysis, final deoxidization, inoculation and pouring. According to the preparation method, the smelting technology is simple, and the adding amount of vanadium and titanium is strictly controlled, so that the wear resistance of the cast iron is 1-2 times that of commonly inoculated cast iron marked as HT200 and HT250, waste steel is less used, and the vanadium-titanium wear resistant cast iron is specially suitable for casting machine guide rails. 本发明公开了种钒钛耐磨铸铁及其制备方法，所述的钒钛耐磨铸铁其成分的重量百分比为C2.9～3.8%、Si1.2～2.2%、Mn0.5～1.3%、V0.16～0.37%、Ti0.03～0.17%、P≤0.2%、S≤0.10%，余量为Fe。所述的制备方法包括配料、预热、熔炼、炉前快速分析、终脱氧、孕育处理、浇注