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1. (WO2014199923) HOT-STAMPED PRODUCT AND PROCESS FOR PRODUCING HOT-STAMPED PRODUCT

Pub. No.:    WO/2014/199923    International Application No.:    PCT/JP2014/065113
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Sat Jun 07 01:59:59 CEST 2014
IPC: C22C 38/00
B21D 22/20
C21D 1/18
C21D 9/00
C21D 9/46
C22C 38/58
C25D 5/26
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
Inventors: AKIBA, Kojiro
秋葉 浩二郎
KONDO, Yusuke
近藤 雄介
KIKUCHI, Yoshitaka
菊地 良貴
KATO, Satoshi
加藤 敏
Title: HOT-STAMPED PRODUCT AND PROCESS FOR PRODUCING HOT-STAMPED PRODUCT
Abstract:
Provided are: a hot-stamped product which can be obtained by hot-stamping an electro-galvanized steel sheet having a low coating weight through use of a rapid heating means such as electrical heating, induction heating or the like at a high efficiency without causing the adhesion of the plating to a die and which can ensure high coating adhesion even without conducting post-treatment such as shot-blasting after the hot stamping; and a process for producing the same. A hot-stamped product obtained by hot-stamping an electro-galvanized steel sheet which has a prescribed composition and which has been plated with electrolytic zinc at a coating weight of 5 to less than 40g/m2 per side, wherein: the plating layer of the hot-stamped product contains 0 to 15g/m2 of a Zn-Fe intermetallic compound with the balance consisting of an Fe-Zn solid-solution phase; and 1×10 to 1×104 particles having a mean diameter of 10nm to 1μm are present in the plating layer of the hot-stamped product per millimeter of the length of the plating layer.