Production of thick 10XCHДΦ steel sheet of optimized composition for the construction industry

On the basis of newly developed steel, thick sheet for the construction industry may be produced, by smelting and casting, hot rolling, and subsequent heat treatment. In the oxygen-converter shop at OAO Magnitogorskii Metallurgicheskii Kombinat (MMK), a 370-t melt of steel is produced as a trial run. The metal is cast to slabs (thickness 300 mm), which are rolled on a 5000 mill to sheet (thickness 22–50 mm). A production technology for thick vanadium-steel sheet on the 5000 mill is developed: rolling with subsequent heat treatment (quenching + tempering); or controlled rolling with subsequent accelerated cooling to ensure the required strength class 390 and impact strength (KCU−60, KCV−20, KCA20). The structure of the cast 10XCHДΦ steel sheet is investigated. Control tests of sheets used in the manufacture of metal structures for the Kazan football stadium confirm the high quality of the sheet.