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

Abstract

Disclosed is an abrasion resistant steel plate, having the following chemical composition (weight%): C: 0.22 - 0.35%, Si: 0.10 - 0.40%, Mn: 0.60 - 1.35%, Rho <= 0.015%, S <= 0.010%, Nb: 0.010 - 0.040%, Al: 0.010-0.080%, B: 0.0006 - 0.0014%, Ti: 0.005-0.050%, Ca: 0.0010 - 0.0080wt.%, V <= 0.080%, Cr <= 0.60%, W <= 1.00wt.%, N <= 0.0080%, O <= 0.0060%, and H <= ０.0004%, with 0.025% <= Nb + Ti <= 0.080%, 0.030% <= Al + Ti <= 0.12%, and the balance being Fe and inevitable impurities. A process for manufacturing the abrasion resistant steel plate comprises steps such as smelting, casting, rolling and directly cooling after rolling. The abrasion resistant steel plate obtained with the above components and process has a high strength and hardness, good low temperature toughness, and an excellent machining performance, and is suitable for devices in engineering machinery and mining machinery susceptible to wear, such as a clamshell, a scraping transporter, etc.

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

Images