公开(公告)号：US20250022639A1

公开(公告)日：2025-01-16

申请号：US18700221

申请日：2022-10-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiaki NATORI ,  Kazutoshi TAKEDA ,  Hiroyoshi YASHIKI ,  Minako FUKUCHI

IPC: H01F1/147 ,  B32B15/04 ,  B32B15/18 ,  C21D1/30 ,  C21D1/74 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60

Abstract: Provided is a non-oriented electrical steel sheet including a base steel sheet and an insulating coating film formed on a surface of the base steel sheet, wherein the base steel sheet has a chemical composition containing, in mass %, C: 0.0030% or less, Si: 3.2 to 6.5%, Mn: 0.05 to 3.5%, P: 0.005 to 0.10%, S: 0.0030% or less, Al: 1.0% of less, Ti: 0.0030% or less, B: 0.0010% or less, Mo: 0.030% or less, V: 0.0010% or less, Ca: 0 to 0.0050%, Mg: 0 to 0.0050%, and REM: 0 to 0.0050%, with a balance being Fe and impurities, and satisfying [S-5/3×Mg-4/5×Ca-1/4×REM 0].

公开(公告)号：US12187009B2

公开(公告)日：2025-01-07

申请号：US18035988

申请日：2021-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Kosuke Kawamoto ,  Yasuto Goto

IPC: B32B15/01 ,  C21D1/74 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C18/32 ,  C25D3/12

Abstract: The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes a plurality of high Co concentration regions in each of which the ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8.

公开(公告)号：US20250003022A1

公开(公告)日：2025-01-02

申请号：US18711439

申请日：2022-11-07

Applicant: POSCO CO., LTD

Inventor： Jong-Pan Kong ,  Young-Roc Im

IPC: C21D9/46 ,  C21D1/18 ,  C21D1/74 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/26 ,  C23C2/40

Abstract: The present invention relates to a cold rolled steel sheet and a manufacturing method therefor, and, more specifically, to a cold rolled steel sheet and a manufacturing method therefor, the cold rolled steel sheet having excellent strength and formability, which can be preferably applied to a structure member such as the members, seat rails, and pillars of a vehicle, and the like.

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：US20240309482A1

公开(公告)日：2024-09-19

申请号：US18273884

申请日：2022-03-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Takuya NISHIO ,  Masafumi AZUMA ,  Yoshimasa NARITA ,  Shintaro OKURA

IPC: C21D9/46 ,  C21D1/18 ,  C21D1/74 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/38 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D1/74 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/38 ,  C23C2/285 ,  C23C2/29 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: This cold-rolled steel sheet has a predetermined chemical composition, in which a metallographic structure of a t/4 portion, which is at a ¼ position of a sheet thickness t from a surface of the cold-rolled steel sheet in a sheet thickness direction has a predetermined structure, and in both an edge portion, which is at a position 50 mm away from an end portion of the cold-rolled steel sheet in a width direction, and a center portion of the cold-rolled steel sheet in the width direction, a metallographic structure of a 20 μm portion, which is at a position 20 μm away from the surface in the sheet thickness direction, includes, by volume percentage, ferrite and bainite: 75.0% or more and 100.0% or less in total, and martensite and tempered martensite: 0.0% or more and 25.0% or less in total, an average grain size of the martensite and the tempered martensite in the metallographic structure of the 20 μm portion is 5.0 μm or less, and a metallographic structure of a 75 μm portion, which is at a position 75 μm away from the surface in the sheet thickness direction, includes, by volume percentage, ferrite and bainite: 0.0% or more and 15.0% or less in total.

公开(公告)号：US20240301530A1

公开(公告)日：2024-09-12

申请号：US18647591

申请日：2024-04-26

Applicant: MM Metals USA, LLC

Inventor： Daniel SHAW ,  James SAVILLE ,  John WILLIAMS ,  Trevor N. MUSTOE

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 a high yield of low carbon ferroalloy, e.g., low carbon ferrochrome, from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.

公开(公告)号：US20240232453A9

公开(公告)日：2024-07-11

申请号：US18492210

申请日：2023-10-23

Applicant: Honeywell Federal Manufacturing & Technologies, LLC

Inventor： Wesley Alexander Everhart ,  Joseph Newkirk

IPC: G06F30/17 ,  C21D1/74 ,  C21D6/00 ,  C22C1/03 ,  C22C19/07 ,  C22C33/06 ,  C22C38/10 ,  C22C38/12 ,  C22F1/02 ,  C22F1/10 ,  G06N5/022 ,  G16C60/00

CPC classification number: G06F30/17 ,  C21D1/74 ,  C21D6/007 ,  C22C1/03 ,  C22C19/07 ,  C22C33/06 ,  C22C38/10 ,  C22C38/12 ,  C22F1/02 ,  C22F1/10 ,  G06N5/022 ,  G16C60/00

Abstract: Methods of modeling metal alloys and forming those alloys are provided. The method involves comparing the strain accommodation and cleavage energies of a base alloy comprising a first metal and a chemical element different from the first metal. If a predetermined difference between those energies would be achieved, the base alloy will be sufficiently ductile. If that predetermined difference would not be achieved, the base alloy will not be sufficiently ductile, and the base alloy is modified (e.g., by adding a ductility component) until the predetermined difference in energies would be achieved, at which point, the alloy can be formed using conventional methods or further modified to achieve the desired degree of ductility.

公开(公告)号：US20240229182A1

公开(公告)日：2024-07-11

申请号：US18364840

申请日：2023-08-03

Applicant: GM Global Technology Operations LLC

Inventor： Zhou WANG ,  Zhisong Chai ,  Wei Xu ,  Jianfeng Wang

IPC: C21D9/46 ,  B32B15/01 ,  C21D1/74 ,  C21D1/84 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/06 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D1/74 ,  C21D1/84 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/06 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A coated steel sheet includes a steel sheet comprising iron (Fe); carbon (C) in a range from 0.05% to 0.35 wt. %; manganese (Mn) in a range from 0.1% to less than 2 wt. %; chromium (Cr) in a range from 1.2% to 6.0 wt. %; silicon (Si) in a range from 0.01% to less than 0.6 wt. %; aluminum (Al) in a range from 0.5% to 1.3 wt. %; vanadium (V) in a range from 0.01% to 0.5 wt. %; niobium (Nb) in a range from 0.01% to 0.2 wt. %; and titanium (Ti) in a range from 0.01% to 0.3 wt. %. A zinc coating is formed on an outer surface of the steel sheet.

公开(公告)号：US11905602B2

公开(公告)日：2024-02-20

申请号：US18106960

申请日：2023-02-07

Applicant: SKF Aerospace France S.A.S

Inventor： Jean-Baptiste Coudert ,  Alexandre Mondelin

IPC: C23C8/32 ,  C21D1/74 ,  C21D9/40 ,  C22C38/00 ,  F16C13/02 ,  F16C19/06

CPC classification number: C23C8/32 ,  C21D1/74 ,  C21D9/40 ,  C22C38/00 ,  F16C13/02 ,  F16C19/06 ,  C21D2211/001

Abstract: A method for reinforcing a steel component, having a carbonitriding step providing a first substep of case-hardening, and a second substep of nitriding, the first and second substeps of case-hardening and of nitriding of the step of carbonitriding the component are performed in one and the same heat treatment cycle.

公开(公告)号：US11884987B2

公开(公告)日：2024-01-30

申请号：US16760399

申请日：2018-10-19

Applicant: ARCELORMITTAL

Inventor： David Zapico Alvarez ,  Florence Bertrand ,  Joris Giroux

IPC: C21D9/46 ,  B32B15/01 ,  C21D1/26 ,  C21D1/76 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  C21D9/56 ,  C21D9/573 ,  C22C18/04 ,  C22C38/38 ,  C23C2/04 ,  C23C2/28 ,  C22C38/14 ,  C21D9/00 ,  C21D1/74 ,  C23C28/00

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D1/26 ,  C21D1/76 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D9/0062 ,  C21D9/561 ,  C21D9/573 ,  C22C18/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/04 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D1/74 ,  C21D2201/02 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C23C28/321 ,  C23C28/345

Abstract: A method for the manufacture of a galvannealed steel sheet including the provision of a specific steel sheet, a recrystallization annealing with specific heating, soaking and cooling sub-steps using an inert gas, a hot-dip galvanizing and an alloying treatment; the galvannealed steel sheet and the use of the galvannealed steel sheet.