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公开(公告)号：EP4194191A1
公开(公告)日：2023-06-14
申请号：EP21852852.9
申请日：2021-08-06
摘要： Provided is a steel sheet comprising a sheet thickness center part and a first surface layer part and a second surface layer part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer part and second surface layer part respectively independently have thicknesses of more than 10 µm to 30% or less of the sheet thickness, the first surface layer part and second surface layer part have average Vickers hardnesses different from the average Vickers hardness of a sheet thickness 1/2 position, and a first hardness cumulative value at a region from a surface of the first surface layer part side to 30% of the sheet thickness is 1.05 times or more of a second hardness cumulative value at a region from a surface of the second surface layer part side to 30% of the sheet thickness.
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公开(公告)号：EP4194571A1
公开(公告)日：2023-06-14
申请号：EP21853905.4
申请日：2021-08-06
摘要： Provided is a steel sheet comprising a sheet thickness center part and a first surface layer softened part and a second surface layer softened part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer softened part and second surface layer softened part have 10 µm or more average thicknesses and have average Vickers hardnesses of 0.90 time or less of the average Vickers hardness of a sheet thickness 1/2 position, and the first surface layer softened part has an average Vickers hardness of 1.05 times or more the average Vickers hardness of the second surface layer softened part.
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公开(公告)号：EP4151770A1
公开(公告)日：2023-03-22
申请号：EP21803558.2
申请日：2021-05-13
摘要： This hot stamping member is a hot stamping member including a base material and a plating layer provided on the base material, in which the plating layer has a Ni-rich region, an Al-rich region and an Fe-rich region in this order from a surface of the plating layer, in a region from the surface of the plating layer to a 100 nm position in the thickness direction from the surface of the plating layer, Ni and Fe satisfy predetermined contents, in a region from the 100 nm position in the thickness direction from the surface of the plating layer to a 500 nm position in the thickness direction from the surface of the plating layer, Ni and Fe satisfy predetermined contents, and, in a region from the 500 nm position in the thickness direction from the surface of the plating layer to a 1000 nm position in the thickness direction from the surface of the plating layer, Ni and Fe satisfy predetermined contents.
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公开(公告)号：EP4151767A1
公开(公告)日：2023-03-22
申请号：EP21803239.9
申请日：2021-05-13
IPC分类号： C23C2/26 , C21D1/18 , C21D9/00 , C21D9/46 , C22C21/02 , C22C38/00 , C22C38/60 , C23C2/12 , C23C28/00
摘要： This steel sheet for hot stamping includes a base material, an Al-Si alloy plating layer in which the Al content is 75 mass% or more, the Si content is 3 mass% or more and the total of the Al content and the Si content is 95 mass% or more and a Ni plating layer in which the Ni content is more than 90 mass% in this order, the chemical composition of the base material is, by mass%, C: 0.01% or more and less than 0.70%, Si: 0.005% to 1.000%, Mn: 0.40% to 3.00%, Nb: 0.010% to 0.200%, a solid solution of Nb: 0.010% to 0.150%, sol. Al: 0.00020% to 0.50000%, P: 0.100% or less, S: 0.1000% or less, N: 0.0100% or less, Cu: 0% to 1.00%, Ni: 0% to 1.00%, V: 0% to 1.00%, Ti: 0% to 0.150%, Mo: 0% to 1.000%, Cr: 0% to 1.000%, B: 0% to 0.0100%, Ca: 0% to 0.010%, REM: 0% to 0.300%, and a remainder: Fe and an impurity, the Al-Si alloy plating layer has a thickness of 7 to 148 µm, and the Ni plating layer has a thickness of more than 200 nm and 2500 nm or less.
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