HPF MOLDING MEMBER HAVING EXCELLENT DELAMINATION RESISTANCE AND MANUFACTURING METHOD THEREFOR

摘要

Provided are an HPF molding member having excellent delamination resistance, and a manufacturing method therefor. The present invention relates to an HPF molding member which has a melted aluminum plating layer formed on the surface of a base steel sheet and has excellent delamination resistance, wherein the base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities, and wherein the plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction so that the difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less.