Plated steel sheet and method of hot-stamping plated steel sheet

摘要

In a plated steel sheet having an aluminum-plating layer comprising at least Al formed on one side or both sides of the steel sheet, there is provided a plated steel sheet which, owing to the presence of a surface coating layer containing a compound having wurtzite crystal structure on the aluminum-plating layer, has excellent lubricity, prevents the plating thickness from becoming uneven during heating, and can improve formability and productivity in hot stamping, and a method of hot-stamping the plated steel sheet.

主权项

1. A method of hot-stamping a plated steel sheet comprising:
heating a blanked plated steel sheet comprising an aluminum-plating layer formed on one side or both sides of the steel sheet, and a surface coating layer containing ZnO overlaid on the aluminum-plating layer(s), and forming the heated plated steel sheet by stamping, wherein the surface coating layer contains at least a ZnO having a wurtzite crystal structure, and the ZnO content in the surface coating layer on each side of the steel sheet, calculated as Zn, is 0.5 to 7 g/m2; and wherein the aluminum-plating layer(s) contains 3 to 15 mass % of Si.