Manufacturing method of high strength stone disk for continuous annealing drawing and ironing with low hardness deviation and less occurrence of ear during deep drawing

摘要

The present invention relates to a method for manufacturing a high strength stone plate for continuous annealing drawing, which is less likely to produce an ear (10) during the process of deep-roofing, and reduces the Ar3 transformation point of the steel plate by hot rolling by adjusting the composition and composition ratio of the steel. By preventing the formation of ferrite and austenite, it reduces the hardness variation in the width direction of the stone plate, limits the composition ratio of the steel, applies the winding temperature of the hot rolled steel sheet differentially, adjusts the rolling reduction rate during cold rolling, and manages the annealing temperature. Method to manufacture high strength stone plate with less anisotropy during deep drawing processing, less defects in width direction to reduce yield rate and increase yield in preventing canning of food containers by reducing the in-plane anisotropy It is about.