| 摘要 |
PURPOSE: A method for manufacturing high strength galvanized steel sheets is provided to improve the wettability of zinc and base steel sheets in galvanizing by discontinuously forming surface oxidation of sheets and to improve a plating property b increasing plating adhesion. CONSTITUTION: A method for manufacturing high strength galvanized steel sheets includes next steps. After steel sheets are annealed in an annealing furnace having a roll for transferring steel sheets, the steel sheets are galvanized in a galvanizing tub to form galvanized steel sheets. The steel sheets are steel containing elements for forming surface oxidation in annealing. The roll has illuminance having 0.5-4.0μm Ra, 1.0-8.0μm of Rz, and 1-7μm of Rp. The tension given to the roll is 0.5-3 ton/mm^2. |
