As both C and N content in steel are no more than 30×10-6 and the steel is turned into interstitial atom free status by added micro Ti(excess Ti 0.02%~0.04%) or Ti-Nb (excess Nb <0.02%) alloying to compound residual C and N in steel
the interstitial atom free(IF)sheet steel has excellent deep drawing properties and non-ageing behavior
it is widely used in auto industry. The steelmaking process and chemical composition control
hot rolling
first and second cold rolling technology and annealing process for the IF steel are summarized
the progress of foundation theories for IF steel production is presented
and the secondary working embrittlement and property stability of IF steel are discussed in this paper.