METHOD FOR PRODUCTION OF HIGH-STRENGTH HOT-ROLLED STEEL Russian patent published in 2016 - IPC C21D8/02 C22C38/12 C22C38/26 C22C38/48 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, specifically to production of high-strength hot-rolled steel, used for making articles for petrochemistry and high-speed transport operating in extreme conditions, as well as base layer of bimetallic structures. Workpiece is produced from steel containing following component ratio, wt%: carbon 0.16-0.45, silicon 0.05-0.70, manganese 0.50-1.50, sulphur 0.002-0.008, phosphorus not more than 0.015, chromium not more than 0.15, nickel not more than 0.15, copper not more than 0.15, niobium from 0.005 to less than 0.01, acid-soluble aluminium 0.02-0.05, iron and unavoidable impurities - balance, wherein content of manganese and sulphur is linked by relationship [Mn]·[S] < 0.005. Workpiece is heated to temperature within range from more than 1,250 to 1,300 °C and subjected to hot rolling.

EFFECT: obtained rolled product has high strength properties.

1 cl, 2 tbl