公开(公告)号：US11371110B2

公开(公告)日：2022-06-28

申请号：US16706257

申请日：2019-12-06

申请人： NIPPON STEEL CORPORATION

发明人： Yoshihiro Suwa ,  Toshiki Nonaka ,  Koichi Sato ,  Manabu Naruse ,  Yasunori Iwasa ,  Yoshifumi Kobayashi

IPC分类号： C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/06 ,  C22C38/06 ,  C23C2/28 ,  C25D7/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/40 ,  C23C2/02 ,  C21D1/673 ,  C22C38/26 ,  C21D6/00 ,  C23C2/12

摘要： A cold-rolled steel according to the present invention has a predetermined chemical composition, satisfies (5×[Si]+[Mn])/[C]>10 when [C] is the amount of C by mass %, [Si] is the amount of Si by mass %, and [Mn] is the amount of Mn by mass %, includes 40% to 95% ferrite and 5% to 60% martensite in area fraction, and optionally further includes 10% or less pearlite in area fraction, 5% or less retained austenite in volume fraction, and less than 40% bainite in area fraction. The total of the area fraction of ferrite and the area fraction of martensite is 60% or more, the hardness of martensite measured with a nanoindenter satisfies H2/H1

公开(公告)号：US11965224B2

公开(公告)日：2024-04-23

申请号：US17788131

申请日：2020-02-17

申请人： NIPPON STEEL CORPORATION

发明人： Toshiki Nonaka ,  Toru Yonebayashi

IPC分类号： C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

CPC分类号： C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0268 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/004

摘要： This steel sheet for a can is a steel sheet for a can containing, by mass %, C: 0.010% to 0.050%, Si: 0.020% or less, Mn: 0.10% to 0.60%, P: 0.020% or less, S: 0.020% or less, Al: 0.050% or less, N: 0.0100% or less, Nb: 0% to 0.03%, Ti: 0% to 0.03%, B: 0% to 0.0020%, and a remainder including Fe and unavoidable impurities, in which, when the number of carbides having an equivalent circle diameter of 2 μm or more and 5 μm or less is indicated by a, and the number of carbides having an equivalent circle diameter of 0.1 μm or more and less than 2 μm is indicated by b, a/b satisfies a range of the following formula (1), a fracture strain is 1.6 or more, and a sheet thickness is 0.10 to 0.30 mm

a/b

公开(公告)号：US11846027B2

公开(公告)日：2023-12-19

申请号：US17786902

申请日：2020-03-23

申请人： NIPPON STEEL CORPORATION

发明人： Akihiro Sengoku ,  Kojiro Akiba ,  Toshiki Nonaka

IPC分类号： C23C2/06 ,  C23C28/00 ,  C23C30/00 ,  B32B15/01 ,  C23C2/30 ,  C23C28/02 ,  C23C2/26 ,  C23C2/28 ,  C23C2/04 ,  B32B15/04 ,  B32B15/18 ,  B21D22/02

CPC分类号： C23C2/06 ,  B32B15/011 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C23C2/04 ,  C23C2/26 ,  C23C2/285 ,  C23C2/30 ,  C23C28/023 ,  C23C28/025 ,  C23C28/321 ,  C23C28/3225 ,  C23C30/00 ,  C23C30/005 ,  B21D22/022 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12972

摘要： A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as a layer above the base material and containing Zn. A base material side of the Zn-based plating layer is a Fe—Zn solid solution, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution adjacent to an interface between the base material and the Zn-based plating layer.

公开(公告)号：US10927428B2

公开(公告)日：2021-02-23

申请号：US16356032

申请日：2019-03-18

申请人： NIPPON STEEL CORPORATION

发明人： Toshiki Nonaka ,  Toshio Ogawa ,  Nobuhiro Fujita

IPC分类号： C21D8/02 ,  B32B15/01 ,  C21D9/46 ,  C23C2/02 ,  C23C2/06 ,  C22C38/18 ,  C22C38/22 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/26 ,  C23C2/28

摘要： A hot-dip galvanized steel sheet includes a steel sheet and a hot-dip galvanized layer arranged on the steel sheet, in which the Si content and the Al content by mass % of components of the steel sheet satisfy a relationship 0.5

公开(公告)号：US10544475B2

公开(公告)日：2020-01-28

申请号：US14781110

申请日：2014-03-27

申请人： NIPPON STEEL CORPORATION

发明人： Yoshihiro Suwa ,  Toshiki Nonaka ,  Koichi Sato ,  Manabu Naruse ,  Yasunori Iwasa ,  Yoshifumi Kobayashi

IPC分类号： C22C38/04 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/06 ,  C22C38/06 ,  C23C2/28 ,  C25D7/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C21D6/00 ,  C23C2/12

摘要： A hot-stamped steel according to the present invention has a predetermined chemical composition, satisfies (5×[Si]+[Mn])/[C]>10 when [C] is the amount of C by mass %, [Si] is the amount of Si by mass %, and [Mn] is the amount of Mn by mass %, includes 40% to 95% ferrite and 5% to 60% martensite in area fraction, and optionally further includes 10% or less pearlite in area fraction, 5% or less retained austenite in volume fraction, and less than 40% bainite in area fraction. The total of the area fraction of ferrite and the area fraction of martensite is 60% or more, the hardness of martensite measured with a nanoindenter satisfies H2/H1