High-toughness stable-brinell-hardness extra-thick abrasion-resistant steel and preparation method thereof

Abstract

The invention provides high-toughness stable-brinell-hardness extra-thick abrasion-resistant steel and a preparation method thereof, and belongs to the technical field of metal material manufacturing. The abrasion-resistant steel comprises, by weight, 0.18% to 0.22% of C, 0.10% to 0.30% of Si, 0.90% to 1.10% of Mn, 0.40% to 0.60% of Cr, 0.30% to 0.50% of Mo, 0.10% to 0.30% of Ni, 0.01% to 0.03% of Nb, 0.010% to 0.020% of Ti, 0.010% to 0.030% of Alt, 0.0015% to 0.0025% of B, smaller than or equal to 0.012% of P, smaller than or equal to 0.005% of S and the balance Fe and inevitable impurities. The preparation method includes the steps of casting blank smelting, casting blank casting, casting blank heating, steel plate rolling and heat treatment. The high-toughness stable-brinell-hardness extra-thick abrasion-resistant steel and the preparation method have the advantages that through the reasonable component design and technology improvement, a steel plate is excellent in comprehensive mechanical property, good in impact toughness and stable in abrasion resistance index-brinell hardness value, and the high-toughness stable-brinell-hardness extra-thick abrasion-resistant steel can be massively applied to coal mine machinery and engineering machinery industries and has the high application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacturing, and in particular relates to an extra-thick wear-resistant steel with high toughness and stable Brinell hardness and a preparation method thereof, especially for the extra-thick wear-resistant steel with a specification of 60mm-100mm. Background technique [0002] In general, material damage includes three forms of fracture, corrosion and wear. Compared with the other two forms of damage, wear rarely causes catastrophic damage to metal workpieces, but the economic losses it causes are quite staggering; according to preliminary statistics, the economic losses caused by wear are about 15 billion US dollars per year in the United States. In all kinds of wear, abrasive wear occupies an important position, accounting for 50% of the total metal wear, especially in metallurgical mines, building materials, electric power, agricultural machinery, coal and other industries. Therefore,...

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Problems solved by technology

[0011] The purpose of the present invention is to provide an extra-thick wear-resistant steel with high toughness and stable Brinell hardness and its preparation method, which mainly solves the problem that the toughness of the wear-resistant steel is low due to high strength and the Brinell hardness value in the thickness direction of the extra-thick wear-resistant steel is not high. Uniformity and other issues

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