Overlapping blank for hot stamping, manufacturing method of overlaid hot stamp molded article, and overlaid hot stamp molded article

摘要

Solving the problem related to the difference in the heating rate of the overlapping portion and one sheet, and further improving the corrosion resistance of plating after hot stamping. A first steel plate and at least one second steel plate having an area smaller than that of the first steel plate, connected to a surface of the first steel plate through a welding point, are provided, and the first steel plate is made of aluminum on both surfaces of the first steel plate. It is a plated steel plate having a plated layer, and the second steel plate is a plated steel plate having an aluminum-based plated layer on both sides of the second steel plate, and the adhesion amount of the aluminum-based plated layer in the first steel plate is W1 (g/m2), and in the second steel sheet, the amount of adhesion of the aluminum-based plating layer on the surface of the side not in contact with the first steel sheet is W2 (g/m2), and W1 and W2 are both 20 g/m2 A superimposed blank for hot stamping within a range of not less than 120 g/m 2 and satisfying the relationship of formulas (1) and (2).