Method of manufacturing a thin sheet of low carbon steel.

摘要

The finishing rolling to a thickness of 0.5 mm to 2 mm is performed in a temperature range where the steel has a ferritic structure, with a rolling end temperature equal to or lower than 750 DEG C; the rolls employed for this finishing rolling are lubricated and the hot-rolled strip is then subjected to recrystallising tempering. The strip may be made of steel of the ULC-IF type and the temperature for starting the finishing rolling is then lower than 800 DEG C. The strip may also be made of steel of the ELC or ULC type, and the temperature for starting the finishing rolling is then between 750 DEG C and 550 DEG C or between 450 DEG C and 250 DEG C. The reduction ratio of the strip during the finishing rolling is equal to or greater than 50 %. Subsequently, the hot strip may be cold-rolled in at least one cold-rolling stage, with a total cold reduction ratio lower than or equal to 95 %, to a thickness smaller than or equal to 0.50 mm.