公开(公告)号：US20250101541A1

公开(公告)日：2025-03-27

申请号：US18728216

申请日：2023-01-24

Applicant: JFE STEEL CORPORATION

Inventor： Tomoyuki OKUBO ,  Hayato SAITO ,  Ryuichi SUEHIRO ,  Masayasu UENO ,  Shinya YAMAGUCHI

IPC: C21D9/46 ,  B22D11/00 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58 ,  C22C38/60 ,  H01F1/147

Abstract: Ridging caused when handling steel containing a large amount of alloying elements such as Si and Al in a low-speed hot rolling process is suppressed. A method of producing a hot-rolled steel sheet for a non-oriented electrical steel sheet comprises: producing a steel slab having a certain chemical composition and a thickness of 50 mm to 200 mm by continuous casting; conveying the steel slab to a hot rolling line while maintaining a surface temperature of the steel slab at 800° C. or more; and performing hot rolling in which the steel slab is sequentially subjected to rough rolling, reheating treatment, and finish rolling in the hot rolling line to obtain a hot-rolled steel sheet, wherein the hot rolling is performed under specific conditions.

公开(公告)号：US20160145709A1

公开(公告)日：2016-05-26

申请号：US14903842

申请日：2014-07-08

Applicant: JFE STEEL CORPORATION

Inventor： Yuka MIYAMOTO ,  Takashi KOBAYASHI ,  Chikara KAMI ,  Hayato SAITO ,  Kaneharu OKUDA

IPC: C21D9/46 ,  C22C38/06 ,  C22C38/04 ,  C21D1/26 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C22C38/60 ,  C22C38/02

CPC classification number: C21D9/46 ,  C21D1/26 ,  C21D1/32 ,  C21D1/74 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/0263 ,  C21D2211/003 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60

Abstract: There is provided is a high-carbon hot-rolled steel sheet and method for producing the same. The steel sheet has excellent hardenability consistently, even when annealed in a nitrogen atmosphere, and excellent formability. The steel sheet has a hardness in the range of 83 HRB or less and a total elongation of 30% or more before being subjected to a quenching treatment.

Abstract translation: 提供一种高碳热轧钢板及其制造方法。 即使在氮气氛中退火，钢板也具有优异的淬透性，成型性优异。 在进行淬火处理之前，钢板的硬度为83HRC以下，总伸长率为30％以上。

公开(公告)号：US20170314095A1

公开(公告)日：2017-11-02

申请号：US15526146

申请日：2015-10-13

Applicant: JFE STEEL CORPORATION

Inventor： Hayato SAITO ,  Katsumi KOJIMA ,  Hiroki NAKAMARU

IPC: C21D9/46 ,  B21B1/02 ,  C22C38/32 ,  C22C38/28 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/38 ,  B21B1/22 ,  C21D6/00 ,  C21D8/02 ,  C23G1/00

CPC classification number: C21D9/46 ,  B21B1/026 ,  B21B1/22 ,  B21B2001/028 ,  B21B2001/221 ,  C21D1/28 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0236 ,  C21D8/0268 ,  C21D8/04 ,  C21D8/0436 ,  C21D8/0468 ,  C21D9/48 ,  C21D9/56 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23G1/00

Abstract: A steel sheet for cans has a chemical composition containing, by mass %, C: 0.015% or more and 0.150% or less, Si: 0.04% or less, Mn: 1.0% or more and 2.0% or less, P: 0.025% or less, S: 0.015% or less, Al: 0.01% or more and 0.10% or less, N: 0.0005% or more and less than 0.0050%, Ti: 0.003% or more and 0.015% or less, B: 0.0010% or more and 0.0040% or less, and the balance being Fe and inevitable impurities. The steel sheet has a microstructure including a ferrite phase as a main phase and at least one of a martensite phase and a retained austenite phase as a second phase, the total area fraction of the second phase being 1.0% or more, and the sheet has a tensile strength of 480 MPa or more, a total elongation of 12% or more, and a yield elongation of 2.0% or less.

公开(公告)号：US20200332383A1

公开(公告)日：2020-10-22

申请号：US16754138

申请日：2018-10-29

Applicant: JFE STEEL CORPORATION

Inventor： Fusae SHIIMORI ,  Hayato SAITO ,  Nobusuke KARIYA ,  Katsumi KOJIMA

IPC: C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/14 ,  C22C38/12

Abstract: Provided is a high-strength steel sheet having excellent ductility, bendability, and TS of 500 MPa or more, in particular, a high-strength thin steel sheet for cans having a sheet thickness of 0.1 to 0.8 mm, the steel sheet having a chemical composition containing C: 0.03-0.15%, Si: 0.01-0.05%, Mn: more than 0.6% and 1.5% or less, P: 0.025% or less, S: 0.02% or less, Al: 0.01-0.10%, N: 0.0005-0.0100%, Ti: 0.005-0.020%, B: 0.0005-0.0100%, and Nb: 0.0050-0.0200% with the balance being Fe and inevitable impurities, in which the steel sheet has a metallic structure containing, in area ratio, 85% or more of ferrite and 1-10% of martensite, the martensite has a grain size of 5 μm or less, and a ratio of martensite having a grain size of 2 μm or less is 80% or more.

公开(公告)号：US20170107592A1

公开(公告)日：2017-04-20

申请号：US15128667

申请日：2015-03-23

Applicant: JFE STEEL CORPORATION

Inventor： Hayato SAITO ,  Mikito SUTO ,  Katsumi KOJIMA ,  Hiroki NAKAMARU

IPC: C21D9/46 ,  C22C38/06 ,  B65D1/12 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C22C38/14 ,  C22C38/04

CPC classification number: C21D9/46 ,  B65D1/12 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0268 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

Abstract: A steel sheet for a can having sufficient hardness and a method for manufacturing the steel sheet. The steel sheet has a chemical composition containing, by mass %, C: 0.0005% or more and 0.0030% or less, Si: 0.05% or less, Mn: 0.50% or more and 1.00% or less, P: 0.030% or less, S: 0.020% or less, Al: 0.01% or more and 0.04% or less, N: 0.0010% or more and 0.0050% or less, B: 0.0005% or more and 0.0050% or less, and Fe and inevitable impurities. Additionally, the steel sheet has a hardness (HR30T) of 56 or more and an average Young's modulus of 215 GPa or more.

公开(公告)号：US20160160308A1

公开(公告)日：2016-06-09

申请号：US14906131

申请日：2014-07-08

Applicant: JFE STEEL CORPORATION

Inventor： Hayato SAITO ,  Yusuke NAKAGAWA ,  Katsumi KOJIMA ,  Hiroki NAKAMARU

IPC: C21D9/46 ,  C21D6/00 ,  C21D1/26 ,  C22C38/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/14

CPC classification number: C21D9/46 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

Abstract: A steel sheet exhibiting good drawability and excellent buckling strength of a can body portion against an external pressure, and a method for manufacturing the same. The steel sheet includes C: 0.0030% or more and 0.0100% or less, Si: 0.05% or less, Mn: 0.10% or more and 1.0% or less, P: 0.030% or less, S: 0.020% or less, Al: 0.010% or more and 0.100% or less, N: 0.0050% or less, Nb: 0.010% or more and 0.050% or less, and incidental impurities. Contents of C and Nb satisfy 0.10 ([Nb]/92.9)/([C]/12)

Abstract translation: 具有良好的拉伸性和罐体部分相对于外部压力的优异的屈曲强度的钢板及其制造方法。 该钢板包括C：0.0030％以上且0.0100％以下，Si：0.05％以下，Mn：0.10％以上且1.0％以下，P：0.030％以下，S：0.020％以下，Al ：0.010％以上且0.100％以下，N：0.0050％以下，Nb：0.010％以上且0.050％以下，附带杂质。 C和Nb的含量满足0.10（[Nb] /92.9）/（[C] / 12）<0.60，钢板的HR30T硬度为56以上，钢板的平均杨氏模量为210GPa， 更多。

公开(公告)号：US20200172308A1

公开(公告)日：2020-06-04

申请号：US16615370

申请日：2018-05-24

Applicant: JFE STEEL CORPORATION

Inventor： Junichi KITAGAWA ,  Tomonari HIRAGUCHI ,  Norihiko NAKAMURA ,  Hayato SAITO ,  Yasuhide OSHIMA ,  Katsumi KOJIMA

IPC: B65D65/42 ,  B65D23/02 ,  B65D23/08 ,  B21D22/28

Abstract: A resin-coated metal sheet for a container, the metal sheet including: a first resin coat layer provided on a first surface of the metal sheet; a second resin coat layer provided on a second surface of the metal sheet, wherein each of the first and the second resin coat layers is composed mainly of a polyester resin having a melting point of 230° C. to 254° C., and the first resin coat layer, in a state that the resin coat layers coat the metal sheet, is formed of a resin material having: an arithmetic average roughness (Ra) of 0.10 μm to 1.0 μm; a crystallization temperature of 110° C. to 160° C.; and a water contact angle of 55 degrees to 80 degrees in a state that the resin coat layers have been heated at 240° C. for 90 seconds after the resin coat layers coat the metal sheet.

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。