公开(公告)号：US20250043376A1

公开(公告)日：2025-02-06

申请号：US18719104

申请日：2022-12-13

Applicant: POSCO CO., LTD.

Inventor： Byungin JUNG ,  Youngsoo CHUN ,  Yongsik PARK

IPC: C21D9/00 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/00 ,  C21D8/06 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32

Abstract: The present disclosure relates to methods for manufacturing a wire rod for cold forging and a screw part, which may manufacture with only quenching heat treatment a part with excellent drilling characteristics, and which may specifically manufacture a part to be used for mechanical coupling of automotive parts manufactured with different materials.

公开(公告)号：US20250011891A1

公开(公告)日：2025-01-09

申请号：US18711815

申请日：2022-08-29

Applicant: Baoshan Iron & Steel Co., Ltd.

Inventor： Sixin Zhao ,  Chengquan Wang

IPC: C21D9/00 ,  B22D11/00 ,  B22D17/00 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

Abstract: Disclosed in the present disclosure is a steel. Apart from 90% or more by mass Fe and inevitable impurities, the steel further contains the following chemical elements in percentage by mass: C: 0.22-0.33%, Si: 0.1-1.0%, Mn: 0.3-1.5%, Cr: 0.2-1.6%, Ni: 2.2-3.8%, Mo: 0.1-0.7%, Cu: 0.02-0.3%, Al: 0.01-0.045%, V: 0.01-0.25%, and N≤0.013%. Further disclosed in the present disclosure is a method for manufacturing the steel, comprising: (1) smelting and casting; (2) forging or rolling, involving processing a casting blank to a finished product size by using a roll-in-one-heat process or roll-in-two-heat process; and (3) quenching and tempering: wherein the heating temperature of quenching is 860-1000° C., the holding time is 2-6 h, and water cooling is performed after the quenching; and the tempering temperature is 400-600° C., the holding time is 1-4 h, and air cooling to room temperature is performed after tempering. The steel of the present disclosure has high strength, well matched toughness and plasticity, and good weather resistance, thereby having good application prospects.

公开(公告)号：US20240410041A1

公开(公告)日：2024-12-12

申请号：US18811972

申请日：2024-08-22

Applicant: CRS HOLDINGS, LLC

Inventor： Paul M. Novotny

IPC: C22C38/58 ,  C21D1/18 ,  C21D1/25 ,  C21D1/58 ,  C21D9/00 ,  C21D9/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  E21B4/02 ,  F16C3/02

Abstract: A steel alloy is disclosed that provides a unique combination of strength, toughness, and fatigue life. The steel alloy has the following composition in weight percent: C
about 0.15 to about 0.30 Mn
about 1.7 to about 2.3 Si
about 0.7 to about 1.1 Cr
about 1.85 to about 2.35 Ni
about 0.5 to about 0.9 Mo + ½W
about 0.1 to about 0.3 Cu
about 0.3 to about 0.7 V + 5/9 × Nb
about 0.2 to about 0.5 The balance of the alloy is iron, usual impurities, and residual amounts of other elements added during melting for deoxidizing and/or desulfurizing the alloy. A hardened and tempered steel article made from the alloy is also disclosed.

公开(公告)号：US12157923B2

公开(公告)日：2024-12-03

申请号：US17417865

申请日：2019-08-23

Applicant: JFE Steel Corporation

Inventor： Hiroshi Hasegawa ,  Hidekazu Minami ,  Tatsuya Nakagaito

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23G1/02 ,  C21D9/00

Abstract: A high-strength hot-dip galvanized steel sheet includes a hot-dip galvanized layer on a surface of the steel sheet and has a specific component composition and a steel microstructure containing, on an area percentage basis, 90% to 100% of martensite and carbide-containing bainite in total and 0% to 10% of retained austenite, and containing prior austenite grains having an aspect ratio of 2.0 or less, in a region extending from 300 μm to 400 μm from the surface layer, in which the ratio of the average amount of C at 5 μm from the surface layer to the average amount of C at 70 μm from the surface layer is 0.2 to 0.8, and the ratio of the standard deviation of the amount of C to the average amount of C in a region extending from 300 μm to 400 μm from the surface layer is 0.40 or less.

公开(公告)号：US12134812B2

公开(公告)日：2024-11-05

申请号：US17053860

申请日：2019-05-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Yutaka Neishi

IPC: C22C38/48 ,  C21C7/10 ,  C21D9/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F02F3/00

Abstract: A steel material has a chemical composition which consists of, in mass %, C: 0.15 to 0.30%, Si: 0.02 to 1.00%, Mn: 0.20 to 0.80%, P: 0.020% or less, S: 0.028% or less, Cr: 0.80 to 1.50%, Mo: 0.08 to 0.40%, V: 0.10 to 0.40%, Al: 0.005 to 0.060%, N: 0.0150% or less, O: 0.0030% or less, and the balance: Fe and impurities, and satisfies Formulae (1) and (2), in which, at a cross section parallel to the axial direction of the steel material for a steel piston, the number of Mn sulfides is 100.0 per mm2 or less, the number of coarse Mn sulfides having an equivalent circular diameter of 3.0 μm or more is in a range of 1.0 to 10.0 per mm2, and the number of oxides is 15.0 per mm2 or less. 0.42≤Mo+3V≤1.50  (1) V/Mo≥0.50  (2)

公开(公告)号：US20240344171A1

公开(公告)日：2024-10-17

申请号：US18756430

申请日：2024-06-27

Applicant: MM Metals USA, LLC

Inventor： Daniel Shaw ,  Adriaan Jacobus Van Der Merwe ,  Ottmar Aloys Lange

IPC: C22B5/04 ,  C21D1/74 ,  C21D6/00 ,  C21D8/12 ,  C21D9/00 ,  C22B1/24 ,  C22C33/04 ,  C22C38/18

CPC classification number: C22B5/04 ,  C21D1/74 ,  C21D6/002 ,  C21D8/1205 ,  C21D9/0025 ,  C21D9/0068 ,  C22B1/24 ,  C22C33/04 ,  C22C38/18

Abstract: A method and system for recovering low carbon ferrochrome from feed materials including chromite ore and aluminum granules in a chamber of an arc furnace using an aluminothermic smelting process carried out in the presence of an inert gas, e.g., Argon. The aluminothermic smelting process produces a bath of molten low carbon ferrochrome metal with molten slag floating thereon in the chamber. The molten low carbon ferrochrome metal and molten slag are extracted individually and processed to provide a solidified low carbon ferrochrome metal product and a solidified slag particles product, respectively. A method for the recirculation, recovery and reuse of the inert gas, and a system for accomplishing the recirculation, recovery and reuse of the inert gas.

公开(公告)号：US20240344163A1

公开(公告)日：2024-10-17

申请号：US18753762

申请日：2024-06-25

Applicant: Relativity Space, Inc.

Inventor： Jordan Noone ,  Timothy A. Ellis ,  John Rising

IPC: C21D9/00 ,  B23K15/00 ,  B23K15/02 ,  B23K26/342 ,  B23K26/70 ,  B28B1/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B33Y80/00 ,  B64G1/00 ,  B64G1/22 ,  C21D1/30 ,  C21D1/60 ,  C21D1/613 ,  C21D7/06

CPC classification number: C21D9/0068 ,  B23K15/0026 ,  B23K15/0086 ,  B23K15/02 ,  B23K26/342 ,  B23K26/702 ,  B28B1/001 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B33Y80/00 ,  B64G1/002 ,  B64G1/22 ,  C21D1/30 ,  C21D1/60 ,  C21D1/613 ,  C21D7/06

Abstract: Systems and methods for additive layer manufacturing of metallic components, such as rocket engines and propellant supply systems, are provided. Methods include melting the surface of a work piece to form a weld pool; adding wire to the weld pool and moving a heat source relative to the work piece to progressively form a new layer of metallic material on the work piece; cooling the formed layer; stress relieving (e.g., peening) the cooled layer; applying a secondary operations either sequentially or simultaneously; and repeating the above steps as required to form components layer by layer. Systems and methods of supplying a first propellant to the rocket engine of a launch vehicle are also provided, where the first propellant is supplied through a heat exchanger for generating mechanical energy to pump the first propellant into the rocket engine, and electrical energy to pump a second propellant into the rocket engine.

公开(公告)号：US12116043B2

公开(公告)日：2024-10-15

申请号：US17431291

申请日：2020-03-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahiko Abe ,  Hiroaki Kubota ,  Daisuke Maeda ,  Yuri Toda

IPC: B62D29/00 ,  B21D22/20 ,  B21D53/88 ,  B62D21/15 ,  C21D9/00

CPC classification number: B62D29/00 ,  B21D22/20 ,  B21D53/88 ,  C21D9/0068 ,  B62D21/15

Abstract: This vehicle body structure includes a frame member with a first top section, a corner section, a vertical wall section, and a second top section, and a first support section and a second support section provided at the second top section. L/h≤6.7 is satisfied where the h represents a length between an outer surface of the first top section and an outer surface of the second top section, and the L represents a length between the first support section and the second support section.

公开(公告)号：US12110565B2

公开(公告)日：2024-10-08

申请号：US18061782

申请日：2022-12-05

Applicant: Soenen Technology NV

Inventor： Luc De Sutter

IPC: C21D9/00 ,  B23F1/06 ,  C21D1/18 ,  C21D1/42 ,  C21D1/773 ,  C21D8/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

CPC classification number: C21D9/0068 ,  B23F1/06 ,  C21D1/18 ,  C21D1/42 ,  C21D1/773 ,  C21D8/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C21D2211/001

Abstract: The present invention relates to a method of hardening slides of a perforating press comprising providing a steel beam; hardening of the steel beam in a vacuum furnace; tempering the steel beam twice; first straightening of the steel beam at a temperature of 20° C.±10° C.; milling of an at least partially continuous sawtooth profile, along a longitudinal direction of the steel beam, on a first side of the steel beam; wherein, after milling the at least partially continuous sawtooth profile on the first side of the steel beam, a second side of the steel beam, lying opposite the first side, is hardened by means of induction currents, after which the steel beam is again tempered twice and after which the steel beam is straightened a second time at a temperature of 20° C.±10° C. The invention also relates to a slide for a perforating press hardened according to the method.

公开(公告)号：US20240327943A1

公开(公告)日：2024-10-03

申请号：US18293713

申请日：2023-04-26

Applicant: NSK STEERING & CONTROL, INC.

Inventor： Takeshi SAITO

IPC: C21D9/00 ,  C21D1/10 ,  C21D1/18 ,  C21D6/00 ,  C21D8/00

CPC classification number: C21D9/0068 ,  C21D1/10 ,  C21D1/18 ,  C21D6/00 ,  C21D8/005 ,  C21D2211/008

Abstract: Provided is a mechanical structural member that can reduce deformation and has high precision and excellent quality. The mechanical structural member has a groove (32) and a tooth (33) formed by plastic working, and includes a hardened layer (31a) with a uniform martensitic single phase structure formed on a surface by induction hardening, a core region (31b) having a sorbite structure, and a boundary layer (31c) in which a sorbite structure and a martensite structure are mixed, formed between the core region (31b) and the hardened layer (31a). Rockwell hardness in the core region is 13 to 28 (HRC), and a variation in the Rockwell hardness is within 6 (HRC).