SETT ATT FRAMSTELLA ICKE-ALDRANDE KALLVALSAT STALBAND MED UTMERKT DJUPDRAGNINGSFORMAGA GENOM EN KONTINUERLIG VERMEBEHANDLING

摘要

A method of producing a non-ageing cold rolled steel strip having excellent deep-drawability, with a r value of 1.5 or higher and ageing index of not higher than 3 kg/mm2 from an Al-killed steel with a lowered carbon content between 0.001 and 0.0035% and with no special additives such as titanium by a relatively low temperature coiling in the hot rolling, and a short-time continuous annealing without over-ageing, thus over-coming the disadvantages caused by a high temperature coiling and by additional over-ageing.