Hot-press formed parts that have excellent bending properties and their manufacturing process

摘要

Provided are hot press formed (HPF) parts having excellent bending properties and a method for manufacturing same. The present invention relates to an HPF part having excellent bending properties, the HPF part having a hot-dip aluminum plated layer formed on a surface of a base steel sheet, wherein the base steel sheet includes, in terms of wt%, 0.18-0.25% of C, 0.1-0.5% of Si,0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe and other impurities; a ferrite phase having a thickness within 50 µ m is continuously or discontinuously formed inside a surface portion of the base steel sheet; the fraction of the surface portion occupied by the ferrite phase is 5% or less; and carbide materials having a size of 1 µ m or less are scattered and distributed in the surface portion of the base steel sheet so as to occupy 90% or more of the overall carbide distribution.