Abstract
The effects of manganese and sulphur on the grain growth and texture development during isochronal annealing have been investigated for cold rolled 0.5% Si steel. Although both manganese and sulphur affect the grain growth, its dependency on Mn content is influenced by the S level. In steels containing 0.004% to 0.017% S, an increase in Mn content leads to marked grain growth through coarsening of manganese sulphide particles. In ultra-low S steels containing less than 0.001% S, however, the grain growth is inhibited by fine precipitates of manganese silicon nitride (MnSiN2). On the other hand, the texture development during grain growth depends only on Mn content, a higher Mn content results in an increase in {222} texture component and a decrease in {110} texture component. This fact is considered to be related to the change in solute N content being counter-balanced with MnSiN2 precipitation.
