Quenching and tempering type abrasion resistant steel and heat treating method thereof

Abstract

The invention relates to quenching and tempering type wear resistant steel and a heat treatment method thereof. The steel comprises the following chemical components by weight percentage: less than or equal to 0.22 percent of C, less than or equal to 0.80 percent of Si, less than or equal to 1.60 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.60 percent of Ni, less than or equal to 1.00 percent of Cr, less than or equal to 0.50 percent of Mo, 0.02 to 0.03 percent of Nb,0.04 to 0.06 percent of V, 0.020 to 0.045 percent of Al, 0.015 to 0.030 percent of Ti, less than or equal to 0.004 percent of B, and the balance being Fe and unavoidable impurities. The steel plate has reasonable obdurability matching, proper hardness, even full-thickness hardness and the mechanical properties reaching the expected design requirements. The steel plate production process has easy operation and high adaptability. The steel plates of various batches have stable and even performance and can reach the requirements for volume production. As the tempering time in a quenching machine is longer, the tempering time can be appropriately shortened in the subsequent production through tests, thereby reducing the cost.

Description

technical field

[0001] The invention relates to a quenched and tempered wear-resistant steel, in particular to an 80mm quenched and tempered wear-resistant steel WNM360B steel plate, and also relates to a heat treatment method for the wear-resistant steel. Background technique

[0002] Quenched and tempered wear-resistant steel is a structural steel plate mainly used in the processing and manufacturing of wear-resistant and vulnerable parts for mines and various construction machinery. This kind of wear-resistant steel requires high hardness and certain plastic toughness. At present, the commonly used wear-resistant steel mainly contains manganese, and its surface hardness and performance are slightly worse. However, the industry often needs to use steel with good hardness and impact resistance. Although the existing alloy steel formula also contains some chromium and nickel, it cannot improve the surface hardness, and the hardness is closely related to the service life, whi...

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