公开(公告)号：US20240068080A1

公开(公告)日：2024-02-29

申请号：US18261885

申请日：2022-03-14

Applicant: NIPPON STEEL CORPORATION

Inventor： Takashi DOI ,  Kenji KOBAYASHI ,  Naomi INATOMI ,  Yuki SUZUKI ,  Soshi FUJITA ,  Masahiro FUDA

IPC: C23C2/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/12 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C23C2/28 ,  C23C2/40

Abstract: A hot-stamped product with improved delayed-fracture resistance is provided. The hot-stamped product 1 includes: a steel substrate 10; and an Al film 20 formed on the steel substrate 10, the Al film 20 including: an interface layer 21 located at the interface with the steel substrate 10 and with part of the αFe substituted by Al and Si; an intermediate layer 22 formed on the interface layer 21; and an oxide layer formed on the intermediate layer, the intermediate layer 22 including an Fe—Al—Si phase 22a with part of the αFe substituted by Al and Si, the Fe—Al—Si phase 22a including one or more elements selected from the group consisting of Zr, Ce, Y, Ta, Ni, Cu, Nb, Cr, Co, V and Ti, the oxide layer 23 including one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, Sc and Zn.