Development of high-temperature hot-rolling process for grain-oriented silicon steel

A numerical study was conducted to analyze the dissolution process of manganese sulfide, and the advantages of very-high-temperature and short-time slab reheating prior to hot rolling were demonstrated. Inhibitor dissolution was greatly accelerated at elevated temperatures. High-temperature and short-time slab reheating also facilitated structure refinement by static recrystallization with appropriate rolling schedules and reduced initial grain sizes. This recrystallization also served to improve product surface quality. Another advantage of the high-temperature hot-rolling process is increased flexibility for controlling inhibitor precipitation during hot rolling.