CPC B32B 15/012 (2013.01) [C22C 21/02 (2013.01); C22C 21/10 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/14 (2013.01); C23C 2/12 (2013.01); C23C 2/26 (2013.01); C23C 2/261 (2022.08); C23C 2/29 (2022.08); C23C 2/40 (2013.01); B32B 2307/718 (2013.01); B32B 2307/732 (2013.01)] | 12 Claims |
1. An aluminum alloy-plated steel sheet comprising:
a base steel sheet;
an alloy-plated layer formed on the base steel sheet; and
an unalloy-plated layer formed on the alloy-plated layer,
wherein the alloy-plated layer contains, by wt %, 35 to 50% of Fe, 1 to 20% of Zn, 0.1 to 1.5% of Si, and a balance of Al and unavoidable impurities,
the unalloy-plated layer contains, by wt %, 1 to 30% of Zn, 0.1 to 1.8% of Si, and a balance of Al and unavoidable impurities, and
an interface roughness Ra, between the alloy-plated layer and the base steel sheet is 2.5 μm or less.
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