| 摘要 |
PURPOSE:To provide a galvanized steel sheet excellent in press formability and spot weldability. CONSTITUTION:On the surface of the plated layer of a galvanized steel sheet, a metallic oxide film of one or >= two kinds among Mo, V and Cu or a tin oxide film is formed as the upper layer. Because this upper layer has higher hardness, the higher m.p. and lower electric resistance compared to those of the plated layer, the sliding resistance between the surface of the plated layer and a pressure die is reduced at the time of press forming, and by reducing the wear amt. of an electrode at the time of spot welding, its continuous spotting properties can be improved. |
