Aluminum-iron alloy-coated steel sheet for hot press forming, having excellent hydrogen delayed fracture resistance, peeling resistance, and weldability and hot-formed member using same

An aluminum-iron (Al—Fe) alloy coated steel sheet for hot forming, having high resistance to hydrogen delayed fracture and coating layer separation and high weldability, the Al—Fe alloy coated steel sheet comprising a base steel sheet and an alloy coating layer formed between the base steel sheet and an oxide layer, wherein the base steel sheet comprises, by wt %, carbon (C):

• 0.1% to 0.5%, silicon (Si):
• 0.01% to 2%, manganese (Mn):
• 0.01% to 10%, phosphorus (P):
• 0.001% to 0.05%, sulfur (S):
• 0.0001% to 0.02%, aluminum (Al):
• 0.001% to 1.0%, nitrogen (N):
• 0.001% to 0.02%, and a balance of iron (Fe) and other impurities,
• wherein the alloy coating layer comprises:
• an Al—Fe alloy layer I formed on the base steel sheet and having a Vickers hardness of 200 Hv to 800 Hv;
• an Al—Fe alloy layer III formed on the Al—Fe alloy layer I and having a Vickers hardness of 700 Hv to 1200 Hv;
• and
• an Al—Fe alloy layer II formed in the Al—Fe alloy layer III continuously or discontinuously in a length direction of the steel sheet, and having a Vickers hardness of 400 Hv to 900 Hv,
• wherein an average oxygen content at a depth of 0.1 μm from a surface of the oxide layer is 20% or less by weight.