Super-strength high-toughness wear resistant steel plate and production method thereof

Abstract

The invention provides a wear resistant steel plate, comprising the following chemical components (wt%): 0.22-0.35% of C, 0.10-0.40% of Si, 0.60-1.35% of Mn, not more than 0.015% of P, not more than 0.010% of S, 0.010-0.040% of Nb, 0.010-0.080% of Al, 0.0006-0.0014% of B, 0.005-0.050% of Ti, 0.0010-0.0080 wt% of Ca, not more than 0.080% of V, not more than 0.60% of Cr, not more than 1.00 wt% of W, not more than 0.0080% N, not more than 0.0060% of O, not more than 0.0004% of H and the balance of Fe and inevitable impurities, wherein Nb+Ti is not less than 0.025% and not more than 0.080%, and Al+Ti is not less than 0.030% and not more than 0.12%. The production method of the wear resistant steel plate comprises the steps of smelting, casting, rolling and directly cooling after rolling. The wear resistant steel plate obtained through the components and the process has the advantages of high intensity, good low temperature toughness, and excellent mechanical processing performance, and is suitable for easily abrasive devices in engineering and mine machinery, such as a grab bucket, a scraper conveyer and the like.

Description

technical field [0001] The invention relates to wear-resistant steel, in particular to a low-alloy, ultra-high-strength, high-toughness wear-resistant steel plate and a manufacturing method thereof. 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] In recent decades, the development and application of wear-resistant steel have developed rapidly. Generally, the carbon content is increased and an appropriate amount of trace elements are added, such as chromium, molybdenum, nickel, vanadium, tungsten, cobalt, boron and titanium, etc., to make full use of precipitation strengthening, Different strengthening method...

AI Technical Summary

Problems solved by technology

[0006] CN1140205A discloses a medium-carbon and medium-alloy wear-resistant steel, the content of carbon and alloy elements (Cr, Mo, etc.) is much higher than that of the present invention, which will inevitably lead to poor welding performance and machinability

[0007] CN1865481A discloses a kind of bainite wear-resistant steel, compared with the present invention, its alloy element (Si, Mn, Cr, Mo etc.) content is higher, weldability, mechanical property are lower

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