公开(公告)号：US20250051872A1

公开(公告)日：2025-02-13

申请号：US18720159

申请日：2022-01-26

Applicant: Hyundai Steel Company

Inventor： Jae Min Lee ,  Sun Young Bae

IPC: C21D9/46 ,  B21D22/02 ,  C22C21/10 ,  C23C2/12 ,  C23C2/40 ,  C23C28/00

Abstract: An embodiment of the present invention discloses a hot-stamped part including: a base steel sheet; and a plated layer provided on the base steel sheet and including zinc (Zn), magnesium (Mg), silicon (Si), aluminum (Al), strontium (Sr), and the balance of iron (Fe) and other inevitable impurities, wherein the plated layer includes an alloying blocking layer, an intermediate alloy layer, and a corrosion resistance reinforcement layer which are sequentially stacked from the base steel sheet, and the corrosion resistance reinforcement layer includes an Sr-containing surface oxide layer.

公开(公告)号：US20250043402A1

公开(公告)日：2025-02-06

申请号：US18718283

申请日：2022-12-12

Applicant: Hyundai Steel Company

Inventor： Nu Ri Shin ,  Yong Ki Seo ,  Ji Hee Son ,  Sang Bae Jung

IPC: C22C38/38 ,  B21D22/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/32

Abstract: The present disclosure provides a material for hot stamping including: a steel sheet including carbon (C) in an amount of 0.19 to 0.25 wt %, silicon (Si) in an amount of 0.1 to 0.6 wt %, manganese (Mn) in an amount of 0.8 to 1.6 wt %, phosphorus (P) in an amount of 0.03 wt % or less, sulfur(S) in an amount of 0.015 wt % or less, chromium (Cr) in an amount of 0.1 to 0.6 wt %, boron (B) in an amount of 0.001 to 0.005 wt %, an additive in an amount of 0.1 wt % or less, a remainder of iron (Fe), and other inevitable impurities; fine precipitates distributed inside the steel sheet, wherein the additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V), the fine precipitates trap hydrogen, and a mean diameter variation coefficient, which is a value obtained by dividing a standard deviation of a mean diameter of the fine precipitates by the mean diameter of the fine precipitates, is 0.8 or less.

公开(公告)号：US20240408661A1

公开(公告)日：2024-12-12

申请号：US18690451

申请日：2022-06-17

Applicant: JFE STEEL CORPORATION

Inventor： Yuta KARIYAZAKI ,  Kentaro SATO

IPC: B21D22/02 ,  G06F30/23 ,  G06F113/22

Abstract: A press forming fracture determination method determines the presence or absence of fracture occurrence in a portion of the metal sheet in which a deformation path changes from compressive deformation to tensile deformation in press forming on the metal sheet, and includes: a step of deriving a forming limit condition related to fracture occurrence in the metal sheet based on a basic forming test in which a metal sheet is deformed in a deformation path that changes from compressive deformation to tensile deformation and FEM analysis therefor; and a step of determining the presence or absence of fracture occurrence in a portion in which the deformation path changes from compressive deformation to tensile deformation in the press forming on the metal sheet based on the derived forming limit condition.

公开(公告)号：US20240399438A1

公开(公告)日：2024-12-05

申请号：US18690779

申请日：2022-09-06

Applicant: ArcelorMittal

Inventor： Arnaud COCU ,  Alice DUMONT

IPC: B21D22/02

Abstract: A high strength, high slenderness structural part having excellent energy absorption properties in the case of an impact is provided. In particular, a structural part for use in an automotive vehicle is provided. The structural part has an ultimate tensile strength higher than 1000 MPa, a yield strength to ultimate tensile strength ratio higher than 0.85, a bending angle normalized to 1.5 mm thickness higher than 55° and a slenderness ratio higher than 10.

公开(公告)号：US20240391129A1

公开(公告)日：2024-11-28

申请号：US18670463

申请日：2024-05-21

Applicant: Oregon Tool, Inc.

Inventor： Todd Gerlach

IPC: B27B33/14 ,  B21D22/02

Abstract: A diamond segment may include a steel weld pad that is configured to be coupled with a drive link of a cutting chain. The diamond segment may further include a diamond layer that is coupled with the steel weld pad such that the diamond layer extends along a height of the steel weld pad at a peripheral portion of the steel weld pad. Other embodiments may be described and claimed.

公开(公告)号：US12134810B2

公开(公告)日：2024-11-05

申请号：US17801145

申请日：2021-05-07

Applicant: NIPPON STEEL CORPORATION

Inventor： Daisuke Maeda ,  Yuri Toda ,  Shingo Fujinaka

IPC: C22C38/02 ,  B21D22/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

Abstract: These steel sheet for hot stamping and hot-stamping formed body have predetermined chemical composition and metallographic structures, and, in textures of a surface layer region and an inside region, ratios between a pole density of an orientation group consisting of {001} to {001} and a pole density of an orientation group consisting of {111} to {111} are controlled.

公开(公告)号：US12098441B2

公开(公告)日：2024-09-24

申请号：US18543606

申请日：2023-12-18

Applicant: ThyssenKrupp Steel Europe AG

Inventor： Maria Köyer ,  Fred Jindra ,  Dirk Czupryna

IPC: C21D9/46 ,  B21D22/02 ,  C21D8/02 ,  C22C21/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/50 ,  C22C38/58 ,  C23C2/12 ,  C23C2/40

CPC classification number: C21D9/46 ,  B21D22/022 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C22C21/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/40 ,  C21D2211/008

Abstract: A flat steel product for production of a sheet metal component by hot forming includes a steel substrate consisting of a steel including 0.1-3% by weight of Mn and optionally up to 0.01% by weight of B, an aluminium-based coating disposed on at least one side of the steel substrate. A coating here has an applied layer weight of 15-30 g/m2. In addition, the coating has an Al base layer consisting of 1.0-15% by weight of Si, optionally 2-4% by weight of Fe, 0.1-5.0% by weight of alkali metals or alkaline earth metals, and optional further constituents, the contents of which are limited to a total of not more than 2.0% by weight, and aluminium as the balance.

公开(公告)号：US12097548B2

公开(公告)日：2024-09-24

申请号：US17397456

申请日：2021-08-09

Applicant: KUKA Systems North America LLC

Inventor： Peter L. Busuttil

IPC: B21D22/02 ,  B29C65/00

CPC classification number: B21D22/022 ,  B29C66/83

Abstract: A tool and associated method for forming an attachment pad on a sheet material made from high strength steel. The tool includes a housing, an anvil supported on the housing and defining a working axis for forming the pad, and a slide block supported on the housing for movement at least along the working axis of the anvil. A die block is supported on the housing opposite the slide block, and is movable in directions along the working axis. The die block cooperates with anvil to form the pad at a target location defined along the working axis. The tool further includes a heating device supported for movement to and between first and second positions relative to the target location. The first position is adjacent to and aligned with the target location, while the second position is displaced from the first position and away from the target location.

公开(公告)号：US20240307942A1

公开(公告)日：2024-09-19

申请号：US18675994

申请日：2024-05-28

Applicant: Microsoft Technology Licensing, LLC

Inventor： Zhicong YAO ,  Kenneth Charles BOMAN ,  Massood NIKKHAH

IPC: B21D22/02

CPC classification number: B21D22/02

Abstract: Enclosure covers for mobile computing devices are often formed from planar sections of sheet metal that form opposing outer-most layers thereof. The enclosure covers generally enclose and protect internal components. Enclosure covers for mobile computing devices are typically made from planar extrusions of aluminum with subsequent computer numerical control (CNC) machining and other processing steps to achieve complex shapes. Machining can be particularly wasteful of material and numerous processing steps are time-consuming and costly. The presently disclosed variable thickness enclosure covers sourced from extruded sheets of variable thickness reduce or eliminate machining and other processing steps typically required to achieve a desired complex shape. This is accomplished by extruding a shape closer to the desired shape of the variable thickness enclosure cover than presently known.

公开(公告)号：US20240301527A1

公开(公告)日：2024-09-12

申请号：US18666200

申请日：2024-05-16

Applicant: POSCO CO., LTD

Inventor： Jin-Keun Oh ,  Yeol-Rae Cho ,  A-Ra Cho ,  Jin-Ho Cha ,  Si-Myoung Heo ,  Jeong-Won Seo ,  Seong-Woo Kim

IPC: C21D9/46 ,  B21B3/02 ,  B21D22/02 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50 ,  C22C38/54

CPC classification number: C21D9/46 ,  B21B3/02 ,  B21D22/022 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50 ,  C22C38/54 ,  C21D2211/003 ,  C21D2211/005

Abstract: An aspect of the present invention relates to a cold-rolled steel plate for hot forming, which is excellent in corrosion-resistance and spot-weldability, contains, by weight %, C: 0.1-0.4%, Si: 0.5-2.0%, Mn: 0.01-4.0%, Al: 0.001-0.4%, P: 0.001-0.05%, S: 0.0001-0.02%, Cr: 0.5% to less than 3.0%, N: 0.001-0.02%, and a balance of Fe and inevitable impurities, satisfying formula (1) below, and includes an Si amorphous oxidation layer continuously or discontinuously formed at a thickness of 1 nm-100 nm on the surface thereof. Formula (1): 1.4≤ 0.4*Cr+Si≤3.2 (wherein element symbols denote measurements of respective element contents by weight %).