CASTING OF HIGH-STRENGTH WEAR-RESISTANT STEEL AND METHODS FOR HEAT TREATMENT OF CASTINGS OF HIGH-STRENGTH WEAR-RESISTANT STEEL

摘要

FIELD: metallurgy. ;SUBSTANCE: invention relates to the field of metallurgy, namely to the casting of high-strength wear-resistant steel used for the manufacture of the main working bodies and structural elements of mining transport and mining equipment. Steel contains, by wt. %: carbon 0.25-0.35, silicon 0.20-0.45, manganese 0.80-1.20, chromium 1.00-1.50, molybdenum 0.20-0.40, nickel 1.0-1.50, copper no more than 0.30, niobium 0.008-0.10, vanadium 0.08-0.10, calcium 0.005-0.01, barium 0.005-0.01, cerium 0.005-0.01, zirconium 0.008-0.1, aluminum 0.008-0.05, sulfur is no more than 0.015, phosphorus no more than 0.015, nitrogen is not more than 0.025, zirconium carbonitride nanoparticles and niobium carbonitride nanoparticles are 0.04-0.25, the rest is iron and impurities. ;EFFECT: invention provides increased strength, wear resistance, impact strength and ductility of the casting steel. ;6 cl, 2 tbl