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    Hot press-formed part, and manufacturing method thereof
    21.
    发明授权
    Hot press-formed part, and manufacturing method thereof 有权

    公开(公告)号：US11578397B2

    公开(公告)日：2023-02-14

    申请号：US17296458

    申请日：2019-11-20

    申请人： POSCO

    发明人： Seong-Woo Kim ,  Jin-Keun Oh ,  Sang-Heon Kim ,  Hyo-Sik Chun

    IPC分类号： B32B15/01 ,  C23C2/28 ,  B21D35/00 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/40

    摘要： The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

    STEEL FOR HOT FORMING, HOT-FORMED MEMBER, AND MANUFACTURING METHODS THEREFOR
    23.
    发明申请
    STEEL FOR HOT FORMING, HOT-FORMED MEMBER, AND MANUFACTURING METHODS THEREFOR 有权

    公开(公告)号：US20230002873A1

    公开(公告)日：2023-01-05

    申请号：US17778614

    申请日：2020-12-18

    申请人： POSCO

    发明人： Seong-Woo Kim ,  Jin-Keun Oh ,  Sang-Heon Kim ,  Hyo-Sik Chun ,  Seong-Beom Bae

    IPC分类号： C22C38/22 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C23C2/12 ,  C22C21/02 ,  B21B1/24

    摘要： An embodiment of the present invention provides steel for hot forming, a hot-formed member, and methods for manufacturing same, the steel comprising, by wt %, 0.06-0.1% of C, 0.05-0.6% of Si, 0.6-2% of Mn, 0.05% or less of P, 0.02% or less of S, 0.01-0.1% of Al, 0.01-0.8% of Cr, 0.01-0.5% of Mo, 0.02% or less of N, and the remainder of Fe and inevitable impurities, wherein an alloy factor represented by relational expression 1 below is 7 or more, and the number of carbides having a circular equivalent diameter of 0.5 μm or greater is 105/mm2 or less. Alloy factor=I(Mn)×I(Si)×I(Cr)×I(Mo)  [Relational expression 1] where the I values for the components are I(Mn)=3.34×Mn+1, I(Si)=0.7×Si+1, I(Cr)=2.16×Cr+1, and I(Mo)=3×Mo+1, respectively, and the content of each component is expressed as wt %.