| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a hot-dip galvanized steel sheet having a beautiful surface appearance and excellent plating adhesion at low cost even if the amount of Si in steel is≥0.2 mass% when manufacturing the hot-dip galvanized steel sheet by executing the hot-dip galvanizing after executing the annealing in a continuous annealing furnace having a direct-fired heating furnace. SOLUTION: In the method for manufacturing the hot-dip galvanized steel sheet to be subjected to the hot-dip galvanizing after annealing the steel sheet containing≥0.2 mass% Si in a continuous annealing furnace having a direct-fired heating furnace, a gas having the oxidizing effect to the steel sheet is blown to a center portion of the steel sheet to promote oxidation of the center portion of the steel sheet in the direct-fired heating furnace. COPYRIGHT: (C)2010,JPO&INPIT |
