| 摘要 |
A high strength galvanized steel sheet excellent in terms of coating adhesiveness which is made from a base material that is a high strength steel sheet containing Si, Mn, and Cr and a method for manufacturing the galvanized steel sheet are provided. The method includes performing an oxidation treatment on steel containing Si, Mn, and Cr in an oxidation furnace under the condition that an exit temperature is T, reduction annealing and a galvanizing treatment, or optionally, further an alloying treatment under conditions that heating is performed at a temperature of 460°C or higher and 600°C or lower for an alloying treatment time of 10 seconds or more and 60 seconds or less, where the exit temperature T satisfies the hollowing expressions:
where [Si]: Si content of the steel by mass%, and
[Cr]: Cr content of the steel by mass%. |
