Hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability
Provided is a hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability, and a manufacturing method therefor, the hot-dip galvanized steel sheet comprising: an inhibition layer formed on a base steel sheet and comprising an Fe—Al-based intermetallic alloy phase; a hot-dip galvanized layer formed on the inhibition layer; and an Al—Mn-based alloy phase discontinuously formed between the inhibition layer and the hot-dip galvanized layer.
1. A hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability, the hot-dip galvanized steel sheet comprising:
an inhibition layer comprising an Fe—Al based intermetallic alloy phase formed on a base steel sheet; a hot-dip galvanized layer formed on the inhibition layer; and an Al—Mn based alloy phase discontinuously formed between the inhibition layer and the hot-dip galvanized layer,
wherein an area ratio of the Al—Mn based alloy phase is 20-40% of a surface of the inhibition layer.
2. The hot-dip galvanized steel sheet of claim 1 , wherein hardness of the hot-dip galvanized layer is 85 Hv or higher.
3. The hot-dip galvanized steel sheet of claim 1 , wherein a thickness of the inhibition layer is 1 μm or less.
4. The hot-dip galvanized steel sheet of claim 1 , wherein a thickness of the hot-dip galvanized layer is 2-60 μm.
5. A hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability, the hot-dip galvanized steel sheet comprising:
an inhibition layer comprising an Fe—Al based intermetallic alloy phase formed on a base steel sheet; a hot-dip galvanized layer formed on the inhibition layer; and an Al—Mn based alloy phase discontinuously formed between the inhibition layer and the hot-dip galvanized layer,
wherein a thickness of the inhibition layer is 1 μm or less.
6. The hot-dip galvanized steel sheet of claim 5 , wherein a thickness of the hot-dip galvanized layer is 2-60 μm.
7. The hot-dip galvanized steel sheet of claim 5 , wherein an area ratio of the Al—Mn based alloy phase is 50% or less (excluding 0%) of a surface of the inhibition layer.
8. The hot-dip galvanized steel sheet of claim 5 , wherein hardness of the hot-dip galvanized layer is 85 Hv or higher.