Strategies for nitrogen control during the production of interstitial-free steel

Interstitial-free (IF) steel is a micro-alloyed steel that contains significantly low concentrations of interstitial elements such as carbon and nitrogen. In this context, nitrogen control in liquid steel is a major issue, particularly in cases where the nitrogen content in hot metal or other charged material is high. This study describes the practice of IF steel production at No.3 steelmaking plant of WISCO using hot metal containing high …