METHOD FOR PRODUCING A COLD-ROLLED FLAT STEEL PRODUCT FOR DEEP-DRAWING AND IRONING APPLICATIONS, FLAT STEEL PRODUCT, AND USE OF A FLAT STEEL PRODUCT OF SAID TYPE

摘要

The invention specifies a method for the operationallyreliable production of a cold-rolled flat steel productof = 0.5 mm in thickness for deep-drawing and ironingapplications. In said method, a steel melt which (in wt%)comprises up to 0.008 % C, up to 0.005 % Al, up to 0.043% Si, 0.15 - 0.5 % Mn, up to 0.02 % P, up to 0.03 % S, upto 0.020 % N and in each case optionally up to 0.03 % Tiand up to 0.03 % Nb and, as a remainder, iron andunavoidable impurities, is, with the omission of a Catreatment, subjected to a secondary metallurgicaltreatment which, in addition to a vacuum treatment,comprises a ladle furnace treatment and during which thesteel melt to be treated is kept under a slag, the Mn andFe contents of which are, in sum total, 15 wt%. Fromthe steel melt, a thin slab or a cast strip are produced,which are subsequently hot-rolled to form a hot stripwith a thickness of 2.5 mm and wound to form a coil.Subsequently, the hot strips are cold-rolled to form aflat steel product of up to 0.5 mm in thickness. Theinvention furthermore relates to a correspondinglyproduced flat steel product, and to uses of such a flatsteel product.