Martensitic wear-resistant steel plate with high wear resistance and manufacturing method thereof

Abstract

The invention discloses a martensite wear-resistant steel plate with high wear resistance, belonging to the technical field of steel manufacturing. According to a technical scheme in the invention, the martensite wear-resistant steel plate comprises the following chemical components by weight: 0.32 to 0.38 % of C, 0.02 to 0.30% of Si, 0.8 to 1.0% of Mn, 0.6 to 0.8% of Ti, 0.02 to 0.03% of Nb, 0.15-0.20% of Mo, 0.35-0.45% of Cr, 0.0010-0.0020% of B, no more than 0.003% of S and no more than 0.012% of P, with the balance being Fe and unavoidable impurity elements. In the process of hot continuous rolling in the invention, TiC particles precipitated through continuous casting are gradually fragmented and homogenized along a rolling direction; through rolling fragmentation and solid-state precipitation of nano-sized TiC, most of the micron-sized TiC particles precipitated through continuous casting disappear; and nano-sized TiC can refine original austenite grains and improve ductility andtoughness.

Description

technical field [0001] The invention belongs to the technical field of steel plate manufacturing, and in particular relates to a martensitic wear-resistant steel plate with high wear resistance and a manufacturing method thereof. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products, and their working conditions are harsh, so wear-resistant steel plates are required to have high strength and high wear resistance. [0003] The structure of traditional wear-resistant steel plates usually chooses single-phase martensite, and the main method to improve its wear resistance is to increase the hardness, which mainly depends on increasing the carbon content in the steel plate; however, the increase in carbon content, the processing performance of the steel plate And the welding performance is seriously deteriorated, and it is difficult to meet the relevant requirements of equipment manufacturing. [0004] In the prior art, micron-sized TiC...

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Problems solved by technology

However, if the size of micron-sized TiC is too large, the quantity is too large, and the particles are too concentrated, it is easy to cause the plasticity and toughness of the steel plate to deteriorate.

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