US 12,404,575 B2
Hot-stamped product
Takashi Doi, Tokyo (JP); Kenji Kobayashi, Tokyo (JP); Naomi Inatomi, Tokyo (JP); Yuki Suzuki, Tokyo (JP); Soshi Fujita, Tokyo (JP); and Masahiro Fuda, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/261,885
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Mar. 14, 2022, PCT No. PCT/JP2022/011331
§ 371(c)(1), (2) Date Jul. 18, 2023,
PCT Pub. No. WO2022/215448, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 2021-063851 (JP), filed on Apr. 5, 2021.
Prior Publication US 2024/0068080 A1, Feb. 29, 2024
Int. Cl. C23C 2/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01)
CPC C23C 2/12 (2013.01) [C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/14 (2013.01); C23C 2/28 (2013.01); C23C 2/40 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A hot-stamped product comprising:
a steel substrate; and
an Al film formed on the steel substrate,
the Al film including:
an interface layer located at an interface with the steel substrate and having a structure with part of αFe substituted by Al and Si;
an intermediate layer formed on the interface layer; and
an oxide layer formed on the intermediate layer,
a thickness of the intermediate layer being not smaller than 15 μm,
the intermediate layer including an Fe—Al—Si phase having a structure with part of αFe substituted by Al and Si,
the Fe—Al—Si phase including one or more elements selected from the group consisting of Zr, Ce, Y, Ta, Ni, Cu, Nb, Co, and V,
an Si content of the Fe—Al—Si phase being 1 to 20 mass %, a total content of Zr, Ce, Y, Ta, Ni, Cu, Nb, Co, and V being 0.10 to 5.0 mass %,
the oxide layer including one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, Sc and Zn,
a total proportion of Be, Mg, Ca, Sr, Ba, Sc and Zn in a composition of the oxide layer excluding oxygen being 0.01 to 80.0 mass %.