Wear-resistant steel plate and manufacture method thereof

Abstract

The invention provides a wear-resistant steel plate and a manufacture method of the wear-resistant steel plate. The wear-resistant steel plate comprises the following chemical components in percentage by weight: 0.15 to 0.35% of C, 0.10 to 0.60% of Si, 0.30 to 1.60% of Mn, not greater than 0.015% of P, not greater than 0.010% of S, 0.10 to 1.00% of Ti, 0.20 to 1.50% of Cr, not greater than 0.80% of Mo, not greater than 1.50% of Ni, not greater than 0.10% of V, 0.0005 to 0.0040% of B, 0.010 to 0.080% of Al, 0.0010 to 0.0080% of Ca, not greater than 0.0080% of N, not greater than 0.0080% of O, not greater than 0.0004% of H, and the balance of Fe and inevitable impurities. The wear-resistant steel plate has the tensile strength more than 1200MPa, elongation rate more than 13%, Brinell hardness more than 400HB, and V-shaped longitudinal Charpy impact power more than 50J at -40 DEG C. The wear-resistant steel plate has high strength and hardness, excellent wear resistance and outstanding mechanical processing performance, and is suitable for being applied to components, which are easily worn, of various mechanical means.

Description

technical field [0001] The present invention relates to wear-resistant steel, in particular to a wear-resistant steel plate and its manufacturing method; its tensile strength is greater than 1200MPa, its elongation is greater than 13%, its Brinell hardness is greater than 400HB, and it has a Charpy V-type longitudinal impact at -40°C The work is greater than 50J; the microstructure is martensite, retained austenite and fine and uniformly distributed hard phase TiC, in which the volume fraction of retained austenite is ≤5%. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products such as engineering, mining, agriculture, cement production, ports, electric power and metallurgy that require high strength and high wear resistance due to extremely harsh working conditions. Such as bulldozers, loaders, excavators, dump trucks and grabs, stackers and reclaimers, feeding bending structures, etc. [0003] Traditionally, austenitic high mangane...

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Problems solved by technology

[0005] Chinese patent CN101250673 discloses a low-carbon low-alloy wear-resistant steel, which is produced by quenching + tempering heat treatment process, has high hardness, but slightly poor machinability

Chinese patent CN102560272A discloses a medium-carbon low-alloy wear-resistant steel, which is produced by TMCP process, has very high strength and hardness, and must have poor machining performance, and is not suitable for equipment with high machining requirements.

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