HOT-STAMP MOLDED PART AND METHOD FOR MANUFACTURING SAME

摘要

The present invention is to produce press hardened parts having excellent properties while avoiding a peeling of a plated layer or an intergranular cracking of a base material during a press forming, in such a manner that when a surface-treated steel sheet in which a Zn-Fe-based plated layer is formed on a surface of a base steel sheet is manufactured by a press hardening process, the forming is started after the surface-treated steel sheet is heated to a temperature that is not lower than an Ac 1 transformation point of the base steel sheet and 950°C or lower and the surface-treated steel sheet is then cooled to a temperature that is not higher than a solidifying point of the plated layer depending on the content of Fe in the plated layer.