公开(公告)号：US12098440B2

公开(公告)日：2024-09-24

申请号：US18033729

申请日：2021-08-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Takafumi Yokoyama ,  Yusuke Tsunemi ,  Tatsuya Obuchi ,  Akinobu Minami ,  Takuya Kuwayama

IPC: C22C38/58 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/60 ,  C23C2/02 ,  C23C2/28 ,  C23C30/00 ,  C23C2/06 ,  C23C2/40 ,  C23G1/08

CPC classification number: C21D9/46 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/18 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/58 ,  C22C38/60 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/285 ,  C23C30/00 ,  C23C30/005 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23G1/08 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12993

Abstract: Provided are a steel sheet having a predetermined chemical composition, and a steel microstructure comprising, by vol %, ferrite: 1 to 50%, ratio of nonrecrystallized ferrite in the ferrite: 0 to 50%, tempered martensite: 1% or more, retained austenite: 5% or more, fresh martensite: 0 to 10%, total of pearlite and cementite: 0 to 5%, and balance: bainite, and, when analyzing the surface by an EPMA, an area ratio of regions with an AlS/SiS ratio of 0.2 or less is 50% or less, and a tensile strength is 980 MPa or more, and a method for producing the same.

公开(公告)号：US20240263265A1

公开(公告)日：2024-08-08

申请号：US18640780

申请日：2024-04-19

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：US12053815B2

公开(公告)日：2024-08-06

申请号：US16349883

申请日：2017-11-15

Applicant: Salzgitter Flachstahl GmbH

Inventor： Ingwer Denks ,  Stefan Mütze ,  Christian Pelz

IPC: B21D53/88 ,  C21D8/02 ,  C21D9/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC classification number: B21D53/88 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/0068 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C21D2221/00

Abstract: The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: —providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent, cutting a blank at room temperature and optionally carrying out further punching or cutting operations, —heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700° C. with a dwell time of at most 10 seconds and subsequent cooling with air, —cold forming the blank in one or more steps to form a chassis part at room temperature.

公开(公告)号：US12024752B2

公开(公告)日：2024-07-02

申请号：US17600021

申请日：2020-04-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohichi Sano ,  Hiroyuki Kawata ,  Kengo Takeda

IPC: C22C38/00 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/02 ,  C23C2/28

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/28 ,  C23C2/29 ,  C21D2211/008

Abstract: This steel sheet has a predetermined chemical composition, in which the area ratio of plate martensite is 10% or more, the average grain size of prior austenite grains is 2.0 μm to 10.0 μm, the maximum diameter thereof is 20.0 μm or less, the amount of solid solution C in martensite is 0.20 mass % or less, the average carbide size is 0.25 μm or less, the crystal orientation difference between plate martensite and another martensite adjacent thereto in the same prior austenite grain is 10.0° or less, and the P concentration at grain boundaries of the prior austenite grains is 4.0 at % or less.

公开(公告)号：US12017274B2

公开(公告)日：2024-06-25

申请号：US17439860

申请日：2020-03-20

Applicant: OVAKO SWEDEN AB

Inventor： Jan-Erik Andersson ,  Joakim Fagerlund

IPC: B22D7/00 ,  B22D18/06 ,  B22D27/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

CPC classification number: B22D7/00 ,  B22D18/06 ,  B22D27/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

Abstract: A method for manufacturing a steel ingot in a casting arrangement employs a vacuum vessel; an ingot mold arranged within the vacuum vessel, and a stirrer arranged to stir liquid steel in the ingot mold. The method employs the following steps: providing a liquid steel melt; filling the ingot mold with the liquid steel melt; applying a reduced pressure within the vacuum vessel; allowing the liquid steel melt to solidify into an ingot; and allowing the liquid steel melt to solidify under stirring within the ingot mold at a reduced pressure during solidification of the steel melt. The liquid steel melt includes a predetermined amount of carbon and; incidental impurity elements in the form of oxides. During stirring, the oxides are reduced by carbothermic reaction in which oxygen in the oxides and carbon in the steel melt form carbon-monoxide.

公开(公告)号：US20240198421A1

公开(公告)日：2024-06-20

申请号：US18555738

申请日：2021-05-19

Applicant: SCHUNK SINTERMETALLTECHNIK GMBH

Inventor： André MITTELSTÄDT ,  Christian STERTZ

IPC: B22F5/10 ,  B22F3/10 ,  B22F3/22 ,  B22F3/24 ,  B22F12/53 ,  B33Y80/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/44 ,  C22C38/48

CPC classification number: B22F5/10 ,  B22F3/1021 ,  B22F3/225 ,  B22F3/24 ,  B22F12/53 ,  B33Y80/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/44 ,  C22C38/48 ,  B22F2003/247 ,  B22F2003/248 ,  B22F2301/35 ,  B22F2302/10 ,  B22F2302/20 ,  B22F2302/25 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00

Abstract: A method for producing a printer nozzle (12, 122, 200) for dispensing a molten material, which has a nozzle body with a receiving section (20) and an outlet section (22, 222) which is, in particular, in the shape of a cone or truncated cone, characterized by the method steps of injection molding powder containing metal and sintering.

公开(公告)号：US12000017B2

公开(公告)日：2024-06-04

申请号：US17523087

申请日：2021-11-10

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：US11939640B2

公开(公告)日：2024-03-26

申请号：US17178518

申请日：2021-02-18

Applicant: JFE Steel Corporation

Inventor： Katsutoshi Takashima ,  Yoshimasa Funakawa

IPC: C21D9/46 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02 ,  C23C30/00 ,  C23G1/00 ,  C23G1/08

CPC classification number: C21D9/46 ,  B32B15/01 ,  B32B15/012 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/0263 ,  C21D8/0268 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C30/00 ,  C23C30/005 ,  C21D8/0236 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C23G1/00 ,  C23G1/08 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12972

Abstract: A method for producing a hot-rolled steel sheet, a method for producing a cold-rolled full-hard steel sheet, and a method for producing a heat-treated sheet are provided herein. The methods comprising hot rolling a steel material of a composition comprising, in mass %, C: 0.05 to 0.12%, Si: 0.80% or less, Mn: 1.30 to 2.10%, P: 0.001 to 0.050%, S: 0.005% or less, Al: 0.01 to 0.10%, N: 0.010% or less, one or more selected from Cr in an amount of 0.05 to 0.50%, and Mo in an amount of 0.05 to 0.50%, one or more selected from Ti in an amount of 0.01 to 0.10%, Nb in an amount of 0.01 to 0.10%, and V in an amount of 0.01 to 0.10%, and the balance Fe and unavoidable impurities.

公开(公告)号：US11923580B2

公开(公告)日：2024-03-05

申请号：US15747973

申请日：2016-07-29

Applicant: POSCO

Inventor： Kwang Min Kim ,  Jong Hee Kim ,  Ki Hoon Jo ,  Bo Sung Seo

IPC: H01M8/1018 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C23F1/28 ,  C23G1/08 ,  C25F3/06 ,  C25F5/00 ,  H01M8/021 ,  H01M8/0217 ,  H01M8/0228 ,  H01M8/1004

CPC classification number: H01M8/1018 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C23F1/28 ,  C23G1/086 ,  C25F3/06 ,  C25F5/00 ,  H01M8/021 ,  H01M8/0219 ,  H01M8/0228 ,  H01M8/1004 ,  Y02P70/50

Abstract: Stainless steel for a fuel cell separator plate and a manufacturing method therefor are disclosed. The stainless steel for a fuel cell separator plate, according to one embodiment of the present invention, comprises: a stainless base material; and a passive film formed on the stainless base material, wherein a Cr/Fe atomic weight ratio in a 1 nm or less thickness region of the stainless base material, which is adjacent to an interface between the stainless and the passive film, is 0.45 or more. Therefore, by modifying the surface of the stainless steel for a fuel cell separator plate, a low interface contact resistance and a good corrosion resistance can be obtained, and a separate additional process such as precious metal coating can be removed, such that manufacturing costs are reduced and productivity can be improved.

公开(公告)号：US11892048B2

公开(公告)日：2024-02-06

申请号：US17058282

申请日：2020-06-15

Applicant: Sumitomo Electric Industries, Ltd.

Inventor： Hiromu Izumida ,  Yoshiki Natsumeda ,  Taichi Okada

IPC: C22C38/02 ,  F16F1/02 ,  C21D6/00 ,  C21D9/52 ,  C22C38/04 ,  C22C38/18

CPC classification number: F16F1/021 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/525 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C21D2211/009 ,  F16F2224/0208

Abstract: A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.5 mass % and not more than 0.7 mass % C, not less than 1 mass % and not more than 2.5 mass % Si, not less than 0.2 mass % and not more than 1 mass % Mn, and not less than 0.5 mass % and not more than 2 mass % Cr, with the balance being Fe and unavoidable impurities. The steel constituting the main body has a pearlite structure. The oxidized layer has a thickness of not less than 2 μm and not more than 5 μm. The oxidized layer contains not less than 60 mass % Fe3O4.