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

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of medium-carbon low-alloy steel, and in particular relates to a high-strength metallurgical saw blade steel and a heat treatment method thereof. Background technique [0002] In recent years, my country's iron and steel industry has developed rapidly, with a complete range of iron and steel products. Among the types of iron and steel products, the most commonly used products are pipes, bars, profiles, wires and strips. In the production process of tubes, bars, profiles, and cold-formed steels (deep-processed products of plates and strips), metallurgical saw blades are used for online cutting to complete the process requirements of removing heads and tails and sizing. The metallurgical industry is generally a large-scale continuous production, and the production efficiency and production volume are very high. Therefore, the saw blades used in the metallurgical industry are required to meet the requirements o...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a high-strength metallurgical saw blade steel and its heat treatment method, which overcomes the disadvantages of environmental pollution, high cost, low efficiency, and uneven hardness caused by traditional oil quenching, and has the advantages of low cost, Good hardenability, high efficiency, uniform hardness, etc., combined with appropriate chemical composition design, it can not only meet the requirements of high hardness and high toughness, but also simplify the production process of saw blades, shorten the production process, and reduce energy consumption.

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