Alloy chromium-powder-containing metallurgical steel and preparation method thereof

The invention relates to an alloy chromium-powder-containing metallurgical steel and a preparation method thereof. The invention is characterized in that the metallurgical steel is prepared from the following raw materials in parts by weight: 94-99 parts of iron powder, 1.4-1.8 parts of nickel powder, 0.6-0.8 part of graphite powder, 1.2-1.4 parts of aluminum powder, 0.4-0.5 part of Bi, 0.03-0.05 part of Sb, 1.6-1.8 parts of Mn, 0.1-0.3 part of Be, 1.2-1.4 parts of boron oxide, 1.0-1.1 parts of CaO, 0.3-0.5 part of tantalum diboride, 0.2-0.4 part of vanadium boride, 2.3-2.5 parts of zinc stearate, 1.2-1.5 parts of microcrystalline wax and 2-3 parts of dispersant. The tool steel provided by the invention has the advantages of high hardness, favorable wear resistance, compact flange structure, favorable microstructure, fewer pores, favorable structural rigidity, favorable hardness, favorable fatigue resistance and favorable tensile strength. Due to the adoption of die pressing, the invention simplifies the equipment and lowers the production cost.