Production of Hot-Rolled Plate from Large-Sized Electric Steel Melting Slabs for Grounds of Wind Generators

In the global metallurgy, there is an accelerated transition to more environmentally friendly steel production technologies with an increased share of secondary raw materials (scrap) and a weakening of the negative impact of the steelmaking process on the environment. As part of the study of technical and technological aspects of the transition from the use of continuously cast slabs from oxygen-converter steel to slabs from electric arc steel, NLMK Dansteel carried out a series of pilot experiments on smelting and thermomechanical rolling of steel products for current industrial orders for the production of hot-rolled plate steel for grounds of offshore wind generators. Using the example of the steel corresponding to category EN 10025-4:2019 S355ML, the quality of continuously cast large slabs produced by the electric arc method at NLMK Verona and the delivery mechanical properties of rolled sheets with a thickness of 68–73 mm produced in the rolling complex 4200 NLMK DanSteel by thermomechanical treatment followed by accelerated cooling have been studied. The total CFP value (carbon footprint) of manufactured sheet metal is at the level of 0.73–0.75 ton CO/ton.