Plated Steel Sheets For Hot Press Forming Having Excellent Hydrogen Brittleness Resistance And Impact Resistance, Hot Press Formed Parts, And Manufacturing Methods Thereof

Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts manufactured therefrom, and manufacturing methods thereof, the plated steel sheets for hot press forming comprising: a base steel sheet comprising, in weight percent, 0.14-0.5% of C, 0.001-1% of Si, 0.3-4% of Mn, 0.001-0.015% of P, 0.0001-0.02% of S, 0.001-0.1% of Al, 0.001-1% of Cr, 0.001-0.02% of N, 0.1% or less of Ti, 0.01% or less of B, 0.005-0.1% of Sb, and a balance of Fe and other inevitable impurities; an aluminum or aluminum alloy plated layer provided on at least one surface of the base steel sheet; and a Sb-rich layer provided between the base steel sheet and the plated layer, wherein relational expressions 1-1 and 1-2 below are satisfied. [In relational expressions 1-1 and 1-2, Sbcoat represents the average Sb content in the plated layer, the unit thereof being weight percent. Sbmax represents the maximum Sb content in the Sb-rich layer, the unit thereof being weight percent. ?t represents the linear distance from the boundary between the plated layer and the Sb-rich layer, to the point where Sbmax was measured, the unit thereof being µm.]

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