STEEL SHEET FOR CAN, ITS MANUFACTURE AND MANUFACTURE OF THREE-PIECE CAN

摘要

PURPOSE:To obtain a steel sheet for a can excellent in corrosion resistance and rusting resistance by rolling a continuously cast slab having a specified compsn., thereafter applying Ni plating thereto, subjecting it to continuous annealing to diffuse and infiltrate Ni into a matrix and thereafter executing skinpass rolling by using a rust preventing rolling oil. CONSTITUTION:A continuously cast slab constituted of, by weight, =0.004% C, =0.02% Sr, 0.05 to 0.30% Mn, =0.020% P, =0.020% S, =0.0050% N, 0.02 to 0.2% Al, =0.01% Nb and the balance Fe with inevitable impurities is subjected to hot rolling and cold rolling. This rolled stock is applied with Ni plating of 0.02 to 0.5g/m2 and is subjected to continuous annealing in a reducing atmosphere to form an Fe-Ni alloy layer in which the weight ratio of Ni/(Fe+ Ni) is regulated to 0.02 to 0.5 and having 10 to 5000Angstrom thickness on the surface of the steel sheet. Next, skinpass rolling is executed by using a rust preventing rolling oil to form a rust preventing oil film having 1 to 100mg/m2 dry weight. In the steel sheet for a can, rusting is not generated till coating for printing is executed. By using this steel sheet for a can, a three-piece can of high quality can be manufactured.