公开(公告)号：US20210164080A1

公开(公告)日：2021-06-03

申请号：US16768869

申请日：2018-12-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Soshi FUJITA ,  Yuki SUZUKI ,  Masahiro FUDA ,  Jun MAKI ,  Hideaki IRIKAWA ,  Takashi ARAMAKI ,  Tatsuya KUBOTA

IPC: C22C38/54 ,  C23C2/12 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/40 ,  C21D9/46 ,  C21D8/02 ,  C21D9/00

Abstract: An aluminum-based plated steel sheet according to an aspect of the present invention includes: a base material; an aluminum-based plating layer located above the base material; and an intermetallic compound layer that is located between the base material and the aluminum-based plating layer and contains an intermetallic compound of Al and Fe, in which the base material has a chemical component within a predetermined range, the aluminum-based plating layer contains, on average, 80 mass % or more and 97 mass % or less of Al, 3 mass % or more and 15 mass % or less of Si, 0 mass % or more and 5 mass % or less of Zn, 0 mass % or more and 5 mass % or less of Fe, 0 mass % or more and 3 mass % or less in total of one or more selected from the group consisting of Mg and Ca, and impurities so that a total amount thereof is 100 mass %, an average value of a thickness of the intermetallic compound layer is 2 μm or more and 10 μm or less, a maximum value of the thickness of the intermetallic compound layer is 10 μm or more and 25 μm or less, and a standard deviation of the thickness of the intermetallic compound layer is 2 μm or more and 10 μm or less.

公开(公告)号：US20210095368A1

公开(公告)日：2021-04-01

申请号：US16634346

申请日：2019-02-15

Applicant: NIPPON STEEL CORPORATION

Inventor： Soshi FUJITA ,  Yuki SUZUKI ,  Masahiro FUDA ,  Jun MAKI ,  Hideaki IRIKAWA ,  Tatsuya KUBOTA

IPC: C23C2/12 ,  C22C21/02 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/60 ,  B21D22/02

Abstract: Fe-Al-based plated hot-stamped member exhibiting excellent formed part corrosion resistance and post-coating corrosion resistance and manufacturing method. The hot-stamping member includes Fe-Al-based plated layer on one or both surfaces of a base material, the base material has a predetermined steel component, Fe-Al-based plated layer has a thickness of 10 μm or more and 60 μm or less, formed by A, B, C and D layers sequentially from a surface toward the base material, and each of the four layers is a Fe-Al-based intermetallic compound containing Al, Fe, Si, Mn and Cr for predetermined contents with the balance made up of impurities, the D layer further contains Kirkendall voids each of which cross-sectional area is 3 μm2-30 μm2 for 10 pieces/6000 μm2 or more and 40 pieces/6000 μm2 or less.