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    HOT-STAMP-MOLDED OBJECT
    1.
    发明公开
    HOT-STAMP-MOLDED OBJECT 审中-公开

    公开(公告)号：EP4321647A1

    公开(公告)日：2024-02-14

    申请号：EP22784433.9

    申请日：2022-03-14

    申请人： NIPPON STEEL CORPORATION

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

    IPC分类号： C23C2/12 ,  B21D22/20 ,  C21D1/18 ,  C21D9/00 ,  C22C38/00 ,  C22C38/14 ,  C22C38/38 ,  C23C2/28

    摘要： 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 aFe 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 aFe 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.