ABRASION RESISTANT STEEL PLATE WITH SUPER-HIGH STRENGTH AND HIGH TOUGHNESS, AND PROCESS FOR PREPARING SAME

摘要

The invention provides a wear-resistant steel plate, which has the following chemical composition (wt.%): C: 0.22-0.35%, Si: 0.10-0.40%, Mn: 0.60-1.35%, P: ‰¤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: 0.0010-0.0080%, V‰¤0.080%, Cr‰¤0.60%, W‰¤1.00wt.%, N‰¤0.0080%, O‰¤0.0060%, H‰¤0.0004%, wherein 0.025%‰¤Nb+Ti‰¤0.080%, 0.030%‰¤Al+Ti‰¤0.12%, and the balance of Fe and unavoidable impurities. The method of manufacturing the wear-resistant steel plate comprises the steps of smelting, casting, rolling, post-rolling direct cooling and the like. The wear-resistant steel plate obtained from the above composition and process has high strength, high hardness, good low-temperature toughness, and excellent machinability, and is suitable for quick-wear devices in engineering and mining machinery, such as bucket and scraper transporter, etc.