公开(公告)号：US20230235421A1

公开(公告)日：2023-07-27

申请号：US18247073

申请日：2021-08-05

Applicant: JFE STEEL CORPORATION

Inventor： Yuji TANAKA ,  Masaki TADA ,  Yuki TOJI ,  Shinsuke KOMINE ,  Yoshie OBATA ,  Yusuke KIMATA

IPC: C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23C2/20

CPC classification number: C21D8/0268 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/0226 ,  C21D8/0263 ,  C23C2/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A high-strength cold-rolled steel sheet comprises: a chemical composition that contains C, Si, Mn, P, S, N, Al, Ti, Nb, and B with a balance consisting of Fe and inevitable impurities, and satisfies [mol % N]/[mol % Ti]

公开(公告)号：US20190062859A1

公开(公告)日：2019-02-28

申请号：US16080067

申请日：2017-02-02

Applicant: JFE STEEL CORPORATION

Inventor： Masaki TADA ,  Katsumi KOJIMA

IPC: C21D8/02 ,  C22C38/12 ,  C21D9/46

Abstract: A steel sheet for a can having high strength, excellent ductility, and good corrosion resistance, and a method for manufacturing the steel sheet. The steel sheet has a chemical composition containing, by mass %, C: 0.020% or more and 0.130% or less, Si: 0.04% or less, Mn: 0.10% or more and 1.20% or less, P: 0.007% or more and 0.100% or less, S: 0.030% or less, Al: 0.001% or more and 0.100% or less, N: more than 0.0120% and 0.0200% or less, Nb: 0.0060% or more and 0.0300% or less, and Fe and inevitable impurities. An absolute value of a difference in an amount of solid solution Nb between a region from a surface to a position located at ⅛ of a thickness and a region from a position located at ⅜ of the thickness to a position located at 4/8 of the thickness is 0.0010 mass % or more.

公开(公告)号：US20250108434A1

公开(公告)日：2025-04-03

申请号：US18729889

申请日：2022-11-28

Applicant: JFE STEEL CORPORATION

Inventor： Kazuki ENDOH ,  Yoshiyasu KAWASAKI ,  Masaki TADA ,  Takuya TAKASHITA ,  Jun HORIUCHI ,  Hiroyuki MASUOKA

IPC: B22F1/12 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/10 ,  B33Y80/00

Abstract: An additive manufacturing product including a steel matrix and ceramic particles dispersed in the steel matrix. The steel matrix has a chemical composition containing, in mass %, C: 0.030% or more and 0.800% or less, Si: 0.01% or more and 2.50% or less, Mn: 0.10% or more and 8.00% or less, P: 0.100% or less, S: 0.0200% or less, Al: 0.100% or less, N: 0.1000% or less, and O: 0.5000% or less, with the balance being Fe and inevitable impurity. The steel matrix has a steel microstructure where area fraction of pores is 0.50% or less, area fraction of martensite in a region excluding pores is 90% or more, average aspect ratio of prior austenite grains is 1.5 or more, and LHA/L is 2.0 or more. Melting point of the ceramic particles is 2000° C. or more.

公开(公告)号：US20170198369A1

公开(公告)日：2017-07-13

申请号：US15313729

申请日：2015-05-11

Applicant: JFE STEEL CORPORATION ,  THYSSENKRUPP RASSELSTEIN GMBH

Inventor： Takumi TANAKA ,  Yusuke NAKAGAWA ,  Masaki TADA ,  Katsumi KOJIMA ,  Hiroki NAKAMARU ,  Kathleen STEIN-FECHNER ,  Burkhard KAUP

IPC: C21D9/46 ,  C22C38/12 ,  C22C38/06 ,  B22D11/00 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C23G1/02 ,  C22C38/14 ,  C22C38/04

CPC classification number: C21D9/46 ,  B22D11/001 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/48 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23G1/02

Abstract: A can steel plate includes: equal or less than 0.0030% by mass of C; equal or less than 0.02% by mass of Si; 0.05-0.60% by mass of Mn; equal or less than 0.020% by mass of P; equal or less than 0.020% by mass of S; 0.010% to 0.100% by mass of Al; 0.0010-0.0050% by mass of N; 0.001-0.050% by mass of Nb; and balance Fe and impurities. Intensity of (111) [1-21] orientation (where −2 represents 2 with bar in Miller indices) and intensity of (111)[1-10] orientation (where −1 represents 1 with bar in Miller indices) satisfy the following equation (1), and in a rolling direction and 90° direction from the rolling direction in a horizontal plane, tensile strength TS (MPa) and fracture elongation El (%) satisfy relations of the following equations (2) and (3). (Intensity of (111) [1-21] orientation)/(Intensity of (111) [1-10] orientation)>0.9 . . . (1), TS>550 . . . (2), El>−0.02×TS+17.5 . . . (3).

公开(公告)号：US20250163552A1

公开(公告)日：2025-05-22

申请号：US18730452

申请日：2022-11-28

Applicant: JFE STEEL CORPORATION

Inventor： Kazuki ENDOH ,  Yoshiyasu KAWASAKI ,  Masaki TADA ,  Takuya TAKASHITA ,  Jun HORIUCHI ,  Hiroyuki MASUOKA

IPC: C22C38/04 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38 ,  C22C38/60

Abstract: An additive manufacturing product that has a chemical composition containing, in mass %, C: 0.030% or more and 0.800% or less, Si: 0.01% or more and 2.50% or less, Mn: 0.10% or more and 8.00% or less, P: 0.100% or less, S: 0.0200% or less, Al: 0.100% or less, N: 0.1000% or less, and O: 0.5000% or less, with the balance being Fe and inevitable impurity. The additive manufacturing product has a steel microstructure where area fraction of pores is 0.50% or less, area fraction of martensite in a region excluding pores is 90% or more, average aspect ratio of prior austenite grains is 1.5 or more, and LHA/L, high-angle grain boundary length LHA divided by grain boundary length L with a misorientation angle of 20° or more and 50° or less, is 2.0 or more.

公开(公告)号：US20230374622A1

公开(公告)日：2023-11-23

申请号：US18247071

申请日：2021-08-05

Applicant: JFE STEEL CORPORATION

Inventor： Yuji TANAKA ,  Masaki TADA ,  Yuki TOJI ,  Shinsuke KOMINE ,  Yoshie OBATA ,  Yusuke KIMATA

IPC: C21D9/46 ,  C22C38/60 ,  C22C38/38 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D1/18 ,  C21D6/00

CPC classification number: C21D9/46 ,  C22C38/60 ,  C22C38/38 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C22C38/005 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D1/18 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/002 ,  C21D2211/001

Abstract: A high-strength cold-rolled steel sheet comprises: a chemical composition that contains C, Si, Mn, P, S, N, Al, Ti, Nb, and B with a balance consisting of Fe and inevitable impurities, and satisfies [mol % N]/[mol % Ti]

公开(公告)号：US20170051377A1

公开(公告)日：2017-02-23

申请号：US15307892

申请日：2015-04-22

Applicant: JFE STEEL CORPORATION

Inventor： Hayato SAITO ,  Katsumi KOJIMA ,  Masaki TADA ,  Hiroki NAKAMARU

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04

CPC classification number: C21D9/46 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0268 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

Abstract: A high-strength steel sheet having good formability and methods for manufacturing. The high-strength steel sheet has a chemical composition including, in mass %, C: 0.010% to 0.080%, Si: 0.05% or less, Mn: 0.10% to 0.70%, P: 0.03% or less, S: 0.020% or less, Al: 0.005% to 0.070% and N: 0.0120% to 0.0180%, the balance being Fe and inevitable impurities. A content of nitrogen in the form of solute nitrogen is 0.0100% or more, average ferrite grain size of the steel sheet is 7.0 μm or less, the density of dislocations at a depth of 1/4 sheet thickness from the surface of the steel sheet is 4.0×1014 m−2 to 2.0×1015 m−2, and the tensile strength and the elongation in the transverse direction, perpendicular to the rolling direction, after aging treatment is 530 MPa or more and 7% or more respectively.

Abstract translation: 具有良好成型性的高强度钢板和制造方法。 高强度钢板具有以质量％计含有C：0.010％〜0.080％，Si：0.05％以下，Mn：0.10％〜0.70％，P：0.03％以下，S：0.020％ 以下，Al：0.005〜0.070％，N：0.0120％〜0.0180％，余量为Fe和不可避免的杂质。 溶质氮形式的氮含量为0.0100％以上，钢板的平均铁素体晶粒尺寸为7.0μm以下，从钢板表面开始的1/4层厚度的位错密度 为4.0×10 14 m -2〜2.0×10 15 m -2，老化处理后的拉伸强度和垂直于轧制方向的横向伸长率分别为530MPa以上7％以上。