Plating steel sheet for hot press forming, forming member using same, and manufacturing method therefor

1. A plated steel sheet for hot press forming, the plated steel sheet comprising:

a base steel sheet;

an Al—Zn-based plating layer formed on at least one surface of the base steel sheet; and

an Fe—Al-based interfacial alloy layer formed between the base steel sheet and the Al—Zn-based plating layer, and the Al—Zn-based plating layer is directly on the Fe—Al-based interfacial alloy layer,

wherein the Al—Zn-based plating layer comprises, by weight percentage (wt %), 10 to 30% of Zn, 1% or less of Fe, and a balance of aluminum (Al) and impurities, and

wherein the Fe—Al-based interfacial alloy layer comprises, by wt %, 30 to 60% of aluminum (Al), 30 to 60% of iron (Fe), 20% or less of silicon (Si), and impurities.

2. The plated steel sheet of claim 1 , wherein the Al—Zn-based plating layer further comprises, by wt %, 0.05 to 10% of at least one selected from the group consisting of beryllium (Be), titanium (Ti), and manganese (Mn).

3. The plated steel sheet of claim 1 , wherein the Al—Zn-based plating layer further comprises, by wt %, 2% or less of magnesium (Mg).

4. The plated steel sheet of claim 1 , wherein a sum of thicknesses of the Al—Zn-based plating layer and the Fe—Al-based interfacial alloy layer is 5 to 40 μm.

5. The plated steel sheet of claim 1 , wherein a thickness of the Fe—Al-based interfacial alloy layer is 5 to 35% of a sum of thicknesses of the Al—Zn-based plating layer and the Fe—Al-based interfacial alloy layer.

6. A hot-process forming member manufactured by hot-press forming a plated steel sheet of claim 1 .