公开(公告)号：US20230241865A1

公开(公告)日：2023-08-03

申请号：US18131622

申请日：2023-04-06

Applicant: ArcelorMittal

Inventor： Christian Allely ,  Pascal Bertho ,  Anirban Chakraborty ,  Hassan Ghassemi-Armaki

IPC: B32B15/01 ,  B23K11/11 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C10/28 ,  C25D3/12 ,  C25D3/22 ,  C25D5/12 ,  C25D5/50

CPC classification number: B32B15/011 ,  B23K11/11 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C10/28 ,  C25D3/12 ,  C25D3/22 ,  C25D5/12 ,  C25D5/50

Abstract: The present invention relates to a method for the manufacture of a galvannealed steel sheet including the steps of A.) coating of the steel sheet with a first coating consisting of nickel and having a thickness between 150 nm and 650 nm, the steel sheet having the following composition in weight percentage 0.10

公开(公告)号：US20230220509A1

公开(公告)日：2023-07-13

申请号：US18124997

申请日：2023-03-22

Applicant: ArcelorMittal

Inventor： Michel SOLER ,  Xavier GARAT

IPC: C21D9/46 ,  B32B15/01 ,  C21D8/02 ,  C21D6/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0205 ,  C21D6/005 ,  C21D6/008 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D2211/005 ,  C21D2211/004 ,  C21D2211/001

Abstract: A cold rolled and annealed steel sheet includes by weight: 0.6≤C≤1.3%, 15.0≤Mn≤35%, 5≤Al≤15%, Si≤2.40%, S≤0.03%, P≤0.1%, N≤0.1%, possibly one or more optional elements chosen among Ni, Cr and Cu in an respective amount of up to 4.0%, up to 3.0% and up to 3.0% and possibly one or more elements chosen among B, Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0%, the remainder of the composition making up of iron and inevitable impurities resulting from the elaboration, the microstructure of the sheet including optionally up to 3% of kappa carbides, optionally up to 10.0% of granular ferrite, the remainder being made of austenite, the average grain size and average aspect ratio of the austenite being respectively below 6 μm and comprised between 1.5 and 6 and the average grain size and average aspect ratio of the ferrite, when present, being respectively below 5 μm and below 3.0.

公开(公告)号：US20230167557A1

公开(公告)日：2023-06-01

申请号：US18095520

申请日：2023-01-10

Applicant: ArcelorMittal

Inventor： Thomas HENRION ,  Ronan JACOLOT ,  Martin BEAUVAIS

IPC: C23C28/02 ,  C22C33/04 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D7/13 ,  B32B15/01

CPC classification number: C23C28/025 ,  C22C33/04 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D7/13 ,  B32B15/016

Abstract: A method for manufacturing a hot-rolled and coated steel sheet having a thickness between 1.8 mm and 5 mm. The method contains the steps of: providing a semi-product having a composition containing: 0.04%≤C≤0.38%, 0.40%≤Mn≤3%, 0.005%≤Si≤0.70%, 0.005%≤Al≤0.1%, 0.001%≤Cr≤2%, 0.001%≤Ni≤2%, 0.001%≤Ti≤0.2%, Nb≤0.1%, B≤0.010%, 0.0005%≤N≤0.010%, 0.0001%≤S≤0.05%, 0.0001%≤P≤0.1%, Mo≤0.65%, W≤0.30%, Ca≤0.006%, hot-rolling with a final rolling temperature FRT, to obtain a hot-rolled steel product having a thickness between 1.8 mm and 5 mm, then cooling down to a coiling temperature Tcoil satisfying: 450° C.≤Tcoil≤Tcoilmax with Tcoilmax=650−140×fγ, Tcoilmax being expressed in degrees Celsius and fγ designating the austenite fraction just before the coiling, and coiling to obtain a hot-rolled steel substrate, pickling and coating the hot-rolled steel substrate with Al or an Al alloy by continuous hot-dipping in a bath, to obtain a hot-rolled and coated steel sheet containing a hot-rolled steel sheet and an Al or an Al alloy coating, having a thickness between 10 and 33 μm, on each side of the hot-rolled steel sheet.

公开(公告)号：US11655516B2

公开(公告)日：2023-05-23

申请号：US16467643

申请日：2017-12-15

Applicant: ArcelorMittal

Inventor： Jean-Marc Pipard ,  Marc Olivier Thenot

IPC: C21D9/46 ,  C21D1/20 ,  C21D1/22 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C23C2/06 ,  C23C2/40 ,  B32B15/01

CPC classification number: C21D9/46 ,  B32B15/012 ,  C21D1/20 ,  C21D1/22 ,  C21D8/0263 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C23C2/06 ,  C23C2/40 ,  B32B2605/08 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C2204/00

Abstract: A tempered and coated steel sheet having a composition containing the following elements, expressed in percentage by weight:



0.17%≤carbon≤0.25%,
1.8%≤manganese≤2.3%,
0.5%≤silicon≤2.0%,
0.03%≤aluminum≤1.2%,
sulphur≤0.03%,
phosphorus≤0.03%,

the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet containing in area fraction, 4 to 20% residual austenite, 0 to 15% of ferrite, 40 to 85% tempered bainite and a minimum of 5% of tempered martensite, wherein the cumulated amounts of tempered martensite and residual austenite is between 10 and 30%. The composition may also contain one or more of the following elements: chromium≤0.4%, molybdenum≤0.3%, niobium≤0.04%, titanium≤0.1%. Manufacturing methods and use of tempered and coated steel sheet for making vehicle parts are also described.

公开(公告)号：US20230079019A1

公开(公告)日：2023-03-16

申请号：US17986479

申请日：2022-11-14

Applicant: ArcelorMittal

Inventor： Daniel Chaleix ,  Daniel Jacques ,  Sergio Pace ,  Eric Silberberg ,  Bruno Schmitz ,  Xavier Vanden Eynde

IPC: C23C14/28 ,  B32B15/00 ,  C25D13/02 ,  C23C14/16 ,  C23C14/56 ,  C23C28/00 ,  C25D13/16 ,  C23C14/58 ,  C23C14/14 ,  C25D13/12

Abstract: A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10−2 mbar and 2·10−1 mbar. A fabrication method and an installation are also provided.

公开(公告)号：US11591665B2

公开(公告)日：2023-02-28

申请号：US16956390

申请日：2018-12-18

Applicant: ArcelorMittal

Inventor： Coralie Jung ,  Astrid Perlade ,  Kangying Zhu ,  Frédéric Kegel

IPC: C01D9/00 ,  C21D8/00 ,  C22C38/00 ,  C23C2/12 ,  C21D9/46 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/32 ,  C23C2/06

Abstract: A cold-rolled and heat treated steel sheet, has a composition comprising 0.1%≤C≤0.4%, 3.5%≤Mn≤8.0%, 0.1%≤Si≤1.5%, Al≤3%, Mo≤0.5%, Cr≤1%, Nb≤0.1%, Ti≤0.1%, V≤0.2%, B≤0.004%, 0.002%≤N≤0.013%, S≤0.003%, P≤0.015%. The structure consists of, in surface fraction: between 8 and 50% of retained austenite, at most 80% of intercritical ferrite, the ferrite grains, if any, having an average size of at most 1.5 μm, and at most 1% of cementite, the cementite particles having an average size lower than 50 nm, martensite and/or bainite.

公开(公告)号：US11590599B2

公开(公告)日：2023-02-28

申请号：US16492437

申请日：2018-02-27

Applicant: ArcelorMittal ,  Universite de Nantes

Inventor： Céline Musik ,  Kangying Zhu ,  Didier Hun ,  Jean-Michel Mataigne ,  Astrid Perlade ,  Renaud Frappier

IPC: B23K11/11 ,  B23K11/16 ,  B32B15/01 ,  B23K101/18 ,  B23K103/04 ,  B23K101/34 ,  B23K101/00

Abstract: A method for resistance spot welding comprising the following successive steps: —providing at least two steel sheets with thickness (th) comprised between 0.5 and 3 mm, at least one of the sheets being a zinc or zinc-alloy coated steel sheet (A) with a tensile strength (TS) higher than 800 MPa and a total elongation (TEL) such as (TS)×(TEL)>14000 MPa %, wherein the composition of the steel substrate of (A) contains, in weight: 0.05%≤C≤0.4%, 0.3%≤Mn≤8%, 0.010%≤Al≤3%, 0.010%≤Si≤2.09%, with 0.5%≤(Si+Al)≤3.5%, 0.001%≤Cr≤1.0%, 0.001%≤Mo≤0.5% and optionally: 0.005%≤Nb≤0.1%, 0.005%≤V≤0.2%, 0.005%≤Ti≤0.1%, 0.0003%≤B≤0.005%, 0.001%≤Ni≤1.0%, the remainder being Fe and unavoidable impurities, —performing resistance spot welding of the at least two steel sheets for producing a weld with an indentation depth (IDepth) on the surface of said steel sheet (A) such as: 100 μm≤(IDepth)≤18.68 (Znsol)−55.1, wherein (IDepth) is in micrometers and wherein Znsol is the solubility of Zn in the steel of sheet (A) at 750° C., in weight %.

公开(公告)号：US20230054179A1

公开(公告)日：2023-02-23

申请号：US17785675

申请日：2020-12-14

Applicant: ArcelorMittal

Inventor： Rosalia REMENTERIA FERNANDEZ ,  Frédéric BONNET ,  Maria Elena CORRAL CORRALES ,  Carla OBERBILLIG

IPC: B22F9/08 ,  B22F10/25 ,  B22F10/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

Abstract: A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%≤C≤0.2%, 4.6%≤Ti≤10%, (0.45×Ti)−0.22%≤B≤(0.45×Ti)+0.70%, S≤0.03%, P≤0.04%, N≤0.05%, O≤0.05% and optionally containing: Si≤1.5%, Mn≤3%, Al≤1.5%, Ni≤1%, Mo≤1%, Cr≤3%, Cu≤1%, Nb≤0.1%, V≤0.5% and including eutectic precipitates of TiB2 and Fe2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the volume percentage of TiB2 being equal or more than 10% and the mean bulk density of the powder being 7.50 g/cm3 or less. A manufacturing method by atomization is also provided.

公开(公告)号：US11578378B2

公开(公告)日：2023-02-14

申请号：US16754589

申请日：2018-10-19

Applicant: ArcelorMittal

Inventor： Anirban Chakraborty ,  Hassan Ghassemi-Armaki

IPC: C21D9/46 ,  B23K11/11 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02 ,  B23K103/20 ,  B23K103/04

Abstract: Method for the manufacture of a galvannealed steel sheet includes the following steps: A) the provision of a pre-coated steel sheet coated with a first coating comprising iron and nickel, such steel sheet having the following chemical composition in weight percent 0.10

公开(公告)号：US20230032122A1

公开(公告)日：2023-02-02

申请号：US17784922

申请日：2020-12-17

Applicant: ArcelorMittal

Inventor： Astrid PERLADE ,  Kangying ZHU ,  Coralie JUNG ,  Frédéric KEGEL

IPC: C21D9/46 ,  B21B1/22 ,  C21D8/02 ,  C21D6/00 ,  C21D1/26 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

Abstract: A hot rolled and heat-treated steel sheet having a composition including, by weight percent C 0.12-0.25% Mn 3.0-8.0%, Si 0.70-1.50%, Al 0.3-1.2%, B 0.0002-0.004%, S≤0.010%, P≤0.020%, N≤0.008%, the remainder of the composition being iron and unavoidable impurities resulting from the smelting, and having a microstructure consisting of, in surface fraction: between 5% and 45% of ferrite, between 25% and 85% of partitioned martensite, the partitioned martensite having a carbides density less than 2×106 /mm2, between 10% and 30% of retained austenite, less than 8% of fresh martensite, a part of the fresh martensite being combined with retained austenite in the shape of martensite-austenite islands in total surface fraction less than 10%, and a pancaking index lower than 5.