Development of pilot batch and grade estimation of coils of steel grade S355MC at rolling mill "1700", PJSC "ILYICH IRON AND STEEL WORKS"

Purpose. Development of technology of hot rolling coils using thermo-mechanical controlledprocess forthewide-strip rolling mill and grade estimation of coils.Methodology. Technology was developed and the first batch was produced using thermo-mechanical controlledprocess and improvement in surface quality was achieved via air cooling to a certain temperature.Findings.There has been developed technology, and pilot batch of hot rolling coils (6×1500 mm, steel grade S355MC) has been produced usingthermo-mechanical controlledprocess (TMCP) forthewide-strip rolling mill 1700. The integrated technology for TMCP coil production (steel grade S355MC) has been firstly developed for the rolling mill 1700 in accordance with EN 10149-2. Air cooling for coils to 450°C after coiling has been firstly used in the developed technology, which provides for decrease in air scale and improvement of surface quality for the customers.