OVERLAPPED BLANK FOR HOT STAMPING, METHOD OF MANUFACTURING OVERLAPPED HOT STAMP MOLDED BODY, AND OVERLAPPED HOT STAMP MOLDED BODY

20-11-2019 дата публикации
Номер:
CA3061938A1
Принадлежит: Nippon Steel Corp
Контакты:
Номер заявки: 3061938
Дата заявки: 05-04-2019



[Problem] To solve a problem related to the difference in temperature increase speed between a layered part and a sheet part, and improving post-hot-stamping plating corrosion resistance. A layered blank for hot stamping, the blank comprising a first steel sheet and at least one second steel sheet that is connected to the surface of the first steel sheet by welding points and has a smaller area than the first steel sheet. The first steel sheet is a plated steel sheet comprising an aluminum plating layer on both sides of the first steel sheet, and the second steel sheet is a plated steel sheet comprising an aluminum plating layer on both sides of the second steel sheet. W1 (g/m2) is the average amount of aluminum plating layer deposited on both sides of the first steel sheet. W2 (g/m2) is the amount of aluminum plating layer deposited on the side of the second steel sheet that does not contact the first steel sheet. W1 and W2 are both within a range of 20 g/m2 to 120 g/m2, inclusive, and satisfy the relationships set forth in formulas (1) and (2).