Effect of rolling schedules on ridging resistance of ultra-thin ferritic stainless steel foil

Abstract

The effect of rolling schedules on the ridging resistance of ultra-thin ferritic stainless steel (FSS) 430 foil was evaluated by studying the microstructure and texture. The results show that specimens processed with three-pass cold rolling under the reductions of 40%, 40% and 31%, respectively, exhibit improved ridging resistance owing to the microstructural refinement and the texture structure optimization. A nearly 40% reduction of ridging height can be achieved using the proposed rolling schedule compared to the other two rolling schedules. In addition, the effect of annealing temperature after cold rolling on the ridging resistance of FSS 430 foil is also found to be crucial, and an optimal annealing temperature of 900 °C is obtained for FSS 430 foil with high ridging resistance. Overall, the improvement in the ridging resistance of FSS 430 foil can be attributed to the reduction in the fraction of {001}<110> and {114}<110> components by optimization of the rolling and annealing processes.