| 摘要 |
[Problem] The invention is intended to improve the galling resistance of the hot-dip Al-based alloy coated layer of a hot-dip Al-based alloy coated steel sheet. [Solution] Provided is a hot-dip Al-based alloy coated steel sheet excellent in workability that comprises a hot-dip Al-based alloy coated layer of a composition containing 1.0 to 12.0 mass% of silicon and 0.002 to 0.080 mass% of boron and formed on a surface of a substrate steel sheet, the coated layer having an I MAX /I 0 ratio of 2.0 or more as measured by GDS (glow discharge optical emission spectrometry) analysis from the outermost surface into the depth of the coated layer, where I MAX is the maximum detection intensity of boron in regions with a sputter depth of 0 to 1.0 µm, and I 0 is the average detection intensity of boron within a sputter depth of 1.0 to 5.0 µm. |
