METHOD OF MANUFACTURING COLD-ROLLED STEEL SHEET FOR ENAMEL WITH EXCELLENT FISH SCALE RESISTANCE

摘要

PURPOSE: A method for manufacturing a cold-rolled steel sheet for a porcelain enamel with an excellent fish scale resistant property is provided to obtain the excellent adhesion between the steel sheet and a porcelain enamel paint and to prevent the generation of fish scale when burning the porcelain enamel by a thermal treatment process control after cold-rolling. CONSTITUTION: A method for manufacturing a cold-rolled steel sheet for a porcelain enamel with an excellent fish scale resistant property includes the following steps of: cold-rolling the steel sheet at a draft percentage of 60% or greater; annealing the cold-rolled steel sheet at a temperature of 840-860°C (S120); cooling the annealed steel sheet up to a temperature of 420-440°C (S130); and over-aging processing the cooled steel sheet at a temperature of 420-440°C (S140). [Reference numerals] (AA) Start; (BB) Finish; (S110) Arranging a steel sheet; (S120) Annealing the steel sheet; (S130) Cooling; (S140) Over-aging process