公开(公告)号：US12000028B2

公开(公告)日：2024-06-04

申请号：US15751020

申请日：2016-08-17

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Taizo Makino ,  Takayuki Kamimura ,  Yuichiro Yamamoto ,  Yutaka Wakasu ,  Kiyonobu Sugae ,  Yukiteru Takeshita ,  Naomitsu Mizui

IPC: C22C38/50 ,  B61F5/50 ,  C21D1/28 ,  C21D6/00 ,  C21D8/06 ,  C21D9/08 ,  C21D9/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F16C3/02

CPC classification number: C22C38/50 ,  B61F5/50 ,  C21D1/28 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/065 ,  C21D9/08 ,  C21D9/28 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F16C3/02 ,  F16C2204/62 ,  F16C2326/10

Abstract: Provided is a rail vehicle axle having an excellent fatigue limit and notch factor. A rail vehicle axle according to the present embodiment has a chemical composition consisting of, in mass %, C: 0.20 to 0.35%, Si: 0.20 to 0.65%, Mn: 0.40 to 1.20%, P: 0.020% or less, S: 0.020% or less, Sn: 0.07 to 0.40%, N: 0.0200% or less, Cu: 0 to 0.30%, Ni: 0 to 0.30%, Cr: 0 to 0.30%, Mo: 0 to 0.08%, Al: 0 to 0.100%, V: 0 to 0.060%, and Ti: 0 to 0.020%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2):

0.58≤C+Si/8+Mn/5+Cu/10+Cr/4+V≤0.67  (1)

Si+0.9Cr≥0.50  (2)



where, each element symbol in Formulae (1) and (2) is substituted by the content (mass %) of a corresponding element.

公开(公告)号：US12000008B2

公开(公告)日：2024-06-04

申请号：US17787174

申请日：2020-12-18

Applicant: POSCO

Inventor： Ki-Cheol Kang ,  Chung-Hwan Lee ,  Yong-Joo Kim ,  Kang-Min Lee ,  Kyoo-Young Lee

IPC: B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/19 ,  C21D1/25 ,  C21D1/76 ,  C21D1/84 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C21D9/56 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/00 ,  C23C28/02 ,  C23C30/00

CPC classification number: C21D9/46 ,  B32B15/01 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/19 ,  C21D1/25 ,  C21D1/76 ,  C21D1/84 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C21D9/562 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/022 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/06 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C23C28/025 ,  C23C28/3225 ,  C23C28/345 ,  C23C30/00 ,  C23C30/005 ,  B32B2307/732 ,  Y10T428/12583 ,  Y10T428/1259 ,  Y10T428/12597 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12993 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24983 ,  Y10T428/26 ,  Y10T428/27 ,  Y10T428/273

Abstract: The present disclosure relates to a high-strength hot-dip galvanized steel sheet having excellent surface quality and electrical resistance spot weldability, and a method for manufacturing the same. A galvanized steel sheet according to an aspect of the present disclosure is a galvanized steel sheet including a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a ratio (a/b) of a hardness of a surface layer portion (a) to a hardness of an internal portion (b) of the base steel sheet may be less than 0.95.

公开(公告)号：US12000006B2

公开(公告)日：2024-06-04

申请号：US17248953

申请日：2021-02-15

Applicant: MACLEAN-FOGG COMPANY

Inventor： Charles D. Tuffile ,  Harald Lemke

IPC: C21D8/02 ,  B22F10/00 ,  B22F10/20 ,  B22F10/28 ,  B22F10/32 ,  B22F10/36 ,  B22F12/17 ,  B23K26/00 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y70/00 ,  C21D1/18 ,  C21D1/613 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C23C8/22 ,  C23C8/54 ,  B22F1/05 ,  B22F3/24 ,  B22F9/08 ,  C22C33/02

CPC classification number: C21D1/18 ,  B22F10/00 ,  B22F10/20 ,  B22F10/28 ,  B22F10/32 ,  B22F10/36 ,  B22F12/17 ,  B23K26/0006 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y70/00 ,  C21D1/613 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0257 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C23C8/22 ,  C23C8/54 ,  B22F1/05 ,  B22F2003/241 ,  B22F2003/248 ,  B22F9/082 ,  B22F2201/02 ,  B22F2201/30 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/0278 ,  Y02P10/25

Abstract: Alloy compositions for 3D metal printing procedures which provide metallic parts with high hardness, tensile strengths, yield strengths, and elongation. The alloys include Fe, Cr and Mo and at least three or more elements selected from C, Ni, Cu, Nb, Si and N. As built parts indicate a tensile strength of at least 1000 MPa, yield strength of at least 640 MPa, elongation of at least 3.0% and hardness (HV) of at least 375.

公开(公告)号：US11993825B2

公开(公告)日：2024-05-28

申请号：US17298782

申请日：2019-12-02

Applicant: POSCO

Inventor： Seong-Woo Kim ,  Jin-Keun Oh ,  Sang-Heon Kim ,  Sang-Bin Han

IPC: B32B15/01 ,  C21D6/00 ,  C21D8/04 ,  C21D9/48 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/48 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0421 ,  C21D8/0447 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/12 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 μm or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.

公开(公告)号：US11993823B2

公开(公告)日：2024-05-28

申请号：US16544127

申请日：2019-08-19

Applicant: UNITED STATES STEEL CORPORATION

Inventor： David Paul Hoydick ,  Eduardo Augusto Silva ,  Matthew Michael McCosby

IPC: C21D9/46 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/20 ,  C21D1/22 ,  C21D1/25 ,  C21D1/26 ,  C21D1/78 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/40 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02 ,  C25D3/22 ,  C25D5/36

CPC classification number: C21D9/46 ,  B32B15/013 ,  B32B15/043 ,  B32B15/18 ,  C21D1/20 ,  C21D1/22 ,  C21D1/25 ,  C21D1/26 ,  C21D1/78 ,  C21D8/0247 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/40 ,  C22C38/54 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/021 ,  C23C28/025 ,  C25D3/22 ,  C25D5/36 ,  C21D8/0236 ,  C21D8/0278 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008

Abstract: The present invention provides steel sheet products having controlled compositions that are subjected to two-step annealing processes to produce sheet products having desirable microstructures and favorable mechanical properties such as high strength and ultra-high formability. The steel sheet products may be cold rolled or hot rolled. Steels processed in accordance with the present invention exhibit favorable combined ultimate tensile strength and total elongation (UTS•TE) properties, and may fall into the category of Generation 3 advanced high strength steels, desirable in various industries including automobile manufacturers.

公开(公告)号：US20240167133A1

公开(公告)日：2024-05-23

申请号：US18285239

申请日：2021-06-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Naoko KATOU ,  Eisaku SAKURADA ,  Hitoshi NIKAIDO

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

CPC classification number: C22C38/14 ,  C21D6/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009

Abstract: This hot-rolled steel sheet has a predetermined chemical composition and has a metallographic structure containing ferrite with an area ratio of 53.0% or more and 76.0% or less, martensite with an area ratio of 3.0% or more and 10.0% or less, bainite with an area ratio of 14.0% or more and 39.0% or less, and pearlite with an area ratio of 2.6% or less, and with an average diameter of martensite of 0.26 μm or more and 0.70 μm or less, wherein, among all interfaces of the martensite, the total length of the interfaces between the martensite and the bainite is 75.0% or more with respect to the total length of all interfaces of the martensite.

公开(公告)号：US20240167116A1

公开(公告)日：2024-05-23

申请号：US18551541

申请日：2022-03-22

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Yosuke MATSUMOTO ,  Kenshi IKEDA ,  Takuya KOCHI ,  Masayuki SAKATA ,  Tatsunori UCHIDA ,  Koji YAMASHITA ,  Yuta INOUE

IPC: C21D9/52 ,  C21D1/18 ,  C21D1/32 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22

CPC classification number: C21D9/525 ,  C21D1/18 ,  C21D1/32 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22

Abstract: A steel wire for machine structural parts, may include Fe, inevitable impurities, and, by mass: 0.05 to 0.60% C; 0.005 to 0.50% Si; 0.30 to 1.20% Mn; more than 0 to 0.050% P; more than 0 to 0.050% S; 0.001 to 0.10% Al; more than 0 to 1.5% Cr; and more than 0 to 0.02% N. An area of cementite present at ferrite grain boundaries in an area of all cementite of the steel wire may be 32% or more. When a C content (% by mass) of a steel is expressed as [C], an average circular-equivalent diameter of all the cementite is (1.668-2.13 [C]) μm or more and (1.863-2.13 [C]) μm or less.

公开(公告)号：US11987857B2

公开(公告)日：2024-05-21

申请号：US17297292

申请日：2019-12-02

Applicant: ArcelorMittal

Inventor： Irène De Diego Calderon ,  Jean-Christophe Hell

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0268 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005

Abstract: A cold rolled and annealed steel sheet including by weight: 0.6

公开(公告)号：US11986902B2

公开(公告)日：2024-05-21

申请号：US18173089

申请日：2023-02-23

Applicant: HONDA MOTOR CO., LTD.

Inventor： Hiroki Jimbo ,  Tatsumasa Hidaka

IPC: B23K25/00 ,  B23K35/30 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  B23K103/04

CPC classification number: B23K25/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  B23K35/3073 ,  B23K2103/04

Abstract: A welded product includes: multiple steel members; and one or two or more welds with which the multiple steel members are welded together, at least one of the welds having a surface containing slag, the slag having a Si content of 14% by mass or less and having a mass ratio of Si to Mn of 0.25 or less.

公开(公告)号：US20240158884A1

公开(公告)日：2024-05-16

申请号：US18550459

申请日：2022-02-28

Applicant: JFE STEEL CORPORATION

Inventor： Yoshiyasu KAWASAKI ,  Yuki TOJI ,  Tatsuya NAKAGAITO ,  Shinya YAMAGUCHI ,  Masayasu UENO ,  Katsutoshi TAKASHIMA ,  Tomohiro ONO

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/38 ,  C22C38/60 ,  C23C2/06 ,  C23C2/28 ,  C25D3/22 ,  C25D5/50

CPC classification number: C21D9/46 ,  B32B15/011 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/38 ,  C22C38/60 ,  C23C2/06 ,  C23C2/285 ,  C25D3/22 ,  C25D5/50

Abstract: A clad steel plate having tensile strength (TS) of 780 MPa or more, excellent ductility, bendability, collision resistance, and LME resistance. The clad steel plate having a base metal and a cladding metal on front and back surfaces of the base metal, and the chemical composition and microstructure of the base metal and the cladding metal being appropriately controlled so that the average Vickers hardness (HVL) of the cladding metal is 260 or less, the average Vickers hardness (HVL) of the cladding metal divided by the average Vickers hardness (HVB) of the base metal is 0.80 or less, the boundary roughness between the base metal and the cladding metal is 50 μm or less at the maximum height Ry, and the number of voids at the boundary between the base metal and the cladding metal is controlled to 20 or fewer per 10 mm length of the boundary.