High-strength steel for metallurgical saw blades and heat treatment method thereof

The invention relates to a high-strength steel for metallurgical saw blades and a heat treatment method thereof, belonging to the technical field of medium-carbon low-alloy steel. The steel for metallurgical saw blades comprises the following chemical components: 0.30-0.60% of C, 0.15-0.30% of Si, 1.35-1.9% of Mn, at most 0.02% of P, at most 0.005% of S, 0.07-0.19% of V, 0.025-0.055% of Al, and the balance of Fe and inevitable impurities. The heat treatment method comprises the following steps: smelting, carrying out continuous casting, carrying out hot rolling to obtain a plate, quenching the plate, and carrying out tempering heat treatment to obtain the steel for metallurgical saw blades. By utilizing the off-line or on-line quenching+tempering heat treatment technique and using water as the quenching medium, the method has the characteristics of low cost, favorable hardenability, high efficiency, uniform hardness and the like, and is beneficial to environmental protection; and by matching with the appropriate chemical component design, the method can ensure the requirements for high hardness and high toughness, simplifies the production technique of the saw blade, shortens the production process and lowers the energy consumption.