The invention relates to large-sized
wear resistant steel with high uniformity. The steel is prepared from the chemical components according to weight percent: 0.1 to 0.6% of C, 4.0 to 6.0% of Mn, 0.30 to 0.60% of Si, 0 to 3.0% of Cr, 0 to 2.0% of Ni, 0 to 1.0% of Mo, less than or equal to 0.030% of S, less than or equal to 0.030% of P and the balance of Fe and inevitable impurities. The maximum thickness of a steel plate can reach more than 400 mm, the surface and core
hardness of the steel can reach more than HB600 in
air cooling conditions, the plate type is good, and additionally, the steel has good
impact toughness. According to the steel for a novel large-sized
wear resistant workpiece, when the thickness of the steel plate reaches 400 mm, the steel plate has high
toughness on the premise of high
hardness, additionally, the
microstructure of the steel plate is uniform, the difference between core and surface properties is small, the
microstructure of the workpiece is compact, thesteel is pure, and the performance of each part is uniform. The steel is especially suitable for large-section
wear resistant steel workpieces such as lining plates of autogenous mills and semi-autogenous mills and the like and has the advantages of uniform
microstructure property, low cost and excellent
wear resistance.