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 a plated steel sheet for hot press forming including: a base steel sheet containing, by wt %, 0.14 to 0.5% of C, 0.001 to 1% of Si, 0.3 to 4% of Mn, 0.001 to 0.015% of P, 0.0001 to 0.02% of S, 0.001 to 0.1% of Al, 0.001 to 1% of Cr, 0.001 to 0.02% of N, 0.1% or less of Ti, 0.01% or less of B, 0.005 to 0.1% of Sb, and a balance of Fe and unavoidable impurities; an aluminum or aluminum alloy plating 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 plating layer, wherein the plated steel sheet for hot press forming satisfies the following Relational Expressions 1-1 and 1-2, a hot press formed member manufactured using the same, and methods for manufacturing the plated steel sheet for hot press forming and the hot press formed member. [Relational Expression 1-1] [Relational Expression 1-2] [In Relational Expressions 1-1 and 1-2, Sbrepresents an average content of Sb in the plating layer, and a unit thereof is wt %, Sbrepresents a maximum value of a content of Sb in the Sb-rich layer, and a unit thereof is wt %, and Δt represents a linear distance from a boundary between the plating layer and the Sb-rich layer to a point where Sbis measured, and a unit thereof is μm.]