| 摘要 |
PROBLEM TO BE SOLVED: To provide an alloyed hot dip galvanized steel sheet containing Si and Al and capable of ensuring the plating property, and a method for manufacturing the same. SOLUTION: In an alloyed hot dip galvanized steel sheet, the steel sheet is heated by using a heating furnace of the direct fire reduction heating system, and led to a reducing furnace. The surface of the steel sheet is reduced and annealed, and immersed in a hot dip galvanizing bath to perform galvanizing. The composition of the base steel sheet satisfies the expression Si(%)≤2.0 mass%, Al(%)≤3.0mass%, and 0.6Si(%)≤Al(%) + 0.3. COPYRIGHT: (C)2005,JPO&NCIPI
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