公开(公告)号：US10900105B2

公开(公告)日：2021-01-26

申请号：US14404750

申请日：2013-05-27

Applicant: ARCELORMITTAL

Inventor： Astrid Perlade ,  Ian Alberto Zuazo Rodriguez ,  Xavier Garat

IPC: C22C38/14 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D8/02 ,  C21D9/46 ,  C21D6/00 ,  C21D8/04 ,  B21B1/46 ,  B21B45/02 ,  B21C47/02

Abstract: A rolled steel sheet is provided. The rolled steel sheet has a mechanical strength greater than or equal to 600 MPa and an elongation at fracture that is greater than or equal to 20%. A a method for its fabrication is also provided. The chemical composition of the steel sheet includes 0.10≤C≤0.30%, 6.0≤Mn≤15.0%, 6.0≤Al≤15.0%, and optionally one or more elements selected from among: Si≤2.0%, Ti≤0.2%, V≤0.6% and Nb≤0.3%. The remainder of the composition includes iron and the unavoidable impurities resulting from processing. The ratio of the weight of manganese to the weight of aluminum is such that Mn Al > 1.0 . The microstructure of the sheet includes ferrite, austenite and up to 5% Kappa precipitates in area fraction.

公开(公告)号：US10829839B2

公开(公告)日：2020-11-10

申请号：US14615125

申请日：2015-02-05

Applicant: ArcelorMittal

Inventor： Amar Kumar De

IPC: C22C38/16 ,  C22C38/04 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C21D8/02 ,  C22C38/00

Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.

公开(公告)号：US20200340075A1

公开(公告)日：2020-10-29

申请号：US16764920

申请日：2018-12-11

Applicant: ArcelorMittal

Inventor： Thi Tan VU ,  Marcos PEREZ RODRIGUEZ ,  Carlos LALIENA IRANZO ,  David NORIEGA PEREZ

IPC: C21D9/46 ,  B05D7/14 ,  C21D8/02 ,  C21D6/00 ,  C21D1/70 ,  C22C38/50 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02

Abstract: A coated steel substrate including a coating comprising nanographite having a lateral size between 1 and 60 μm and a binder, wherein the steel substrate has the following compositions in weight percent: 0.31≤C≤1.2%, 0.1≤Si≤1.7%, 0.15≤Mn≤1.1%, P≤0.01%, S≤0.1%, Cr≤1.0%, Ni≤1.0%, Mo≤0.1%, and on a purely optional basis, one or more elements such as Nb≤0.05%, B≤0.003%, Ti≤0.06%, Cu≤0.1%, Co≤0.1%, N≤0.01%, V≤0.05%, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration and a method for the manufacture of the coated steel substrate.

公开(公告)号：US10815410B2

公开(公告)日：2020-10-27

申请号：US16064957

申请日：2016-12-20

Applicant: ArcelorMittal

Inventor： David Noriega Perez

IPC: C09K5/10 ,  B22D11/124 ,  C21D1/60 ,  C21D1/667 ,  C21D1/56 ,  C21D1/00

Abstract: A method of heat transfer between a metallic or non-metallic item and a heat transfer fluid including a fluid medium, hydrophobic nanoparticles having a lateral size between 26 and 50 μm and a dispersing agent is provided. The nanoparticles concentration/dispersing agent concentration ratio in weight is between 3 and 18 and the nanoparticles do not include carbon nanotubes. A heat transfer fluid is also provided.

公开(公告)号：US20200318252A1

公开(公告)日：2020-10-08

申请号：US16881983

申请日：2020-05-22

Applicant: ArcelorMittal

Inventor： Daniel Chaleix ,  Christian Allely ,  Maxime Monnoyer ,  Pascale Feltin

IPC: C25D11/34 ,  C23C22/53 ,  C23C22/68 ,  C25D5/48

Abstract: A sheet includes a steel substrate; a coating covering at least one face of the steel substrate, the coating comprising zinc, magnesium and aluminum; and a zinc hydroxysulfate/zinc sulfate-based temporary protection layer applied over the coating, the temporary protection layer having a sulfur content greater than or equal to 0.5 mg/m2 and less than or equal to 30 mg/m2.

公开(公告)号：US20200283868A1

公开(公告)日：2020-09-10

申请号：US16754589

申请日：2018-10-19

Applicant: ArcelorMittal

Inventor： Anirban CHAKRABORTY ,  Hassan GHASSEMI-ARMAKI

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

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：US20200277693A1

公开(公告)日：2020-09-03

申请号：US16753739

申请日：2018-10-19

Applicant: ArcelorMittal

Inventor： Anirban CHAKRABORTY ,  Hassan GHASSEMI-ARMAKI

IPC: C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  C23C28/02 ,  C21D9/46 ,  C21D6/00 ,  B32B15/01 ,  C22C19/03 ,  C22C38/38 ,  C22C38/34 ,  C22C38/22 ,  C22C38/06

Abstract: Method for the manufacture of a coated steel sheet including the following step of A) the provision of a pre-coated steel sheet coating with a first coating including iron and nickel, B) the thermal treatment of such pre-coated steel sheet at a temperature between 600 and 1000° C., and C) the coating of the steel sheet obtained in step B) with a second coating based on zinc.

公开(公告)号：US20200270754A1

公开(公告)日：2020-08-27

申请号：US16756797

申请日：2018-12-20

Applicant: ArcelorMittal

Inventor： Andrea NAVES ARNALDOS ,  Elena PIEDRA FERNANDEZ ,  Vanesa MENENDEZ DELMIRO ,  Salome LOPEZ GONZALEZ

IPC: C23G1/08 ,  C23G1/36 ,  C23G3/02 ,  B01D61/14

Abstract: The invention relates to a method for pickling steel sheets 8, the steel sheets being continuously dipped in a pickling bath 1, containing a pickling solution 10, the bath being connected to a treatment unit including a recirculation tank 3, circulators 12 and 13, a continuous entering flow 11 of the solution being fed into an ultrafiltration device 2 from the recirculation tank 3 and two flows exiting the ultrafiltration device, one filtered exiting flow 21 being then fed back inside the recirculation tank 3 and one unfiltered flow 22, the treatment unit including no storage tank.

公开(公告)号：US20200263272A1

公开(公告)日：2020-08-20

申请号：US16857115

申请日：2020-04-23

Applicant: ArcelorMittal

Inventor： Michel SANADRES ,  Christine DESSAIN

IPC: C21D9/50 ,  C23F17/00 ,  C22C38/32 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D1/22 ,  C09D167/02 ,  C09D163/00 ,  C09D133/02 ,  C09D123/12 ,  C09D123/06 ,  C08K3/04 ,  B21D35/00 ,  B21D22/02 ,  C21D1/673 ,  C23C2/40 ,  C23C2/28 ,  C23C2/26 ,  C23C2/12 ,  C09D5/32 ,  C09D5/00

Abstract: A fabrication method for a press hardened part is provided. A sheet or a steel substrate blank for heat treatment is provided. A pre-coating is applied. The pre-coating has at least one layer of aluminum or aluminum alloy in contact with the steel substrate on at least one of the principal faces of the sheet or blank. Then a polymerized layer is deposited on the pre-coating. The polymerized layer has a thickness between 2 and 30 μm. The polymerized layer does not contain silicon, has a nitrogen content of less than 1% by weight and carbon pigments in a quantity between 3 and 30% by weight. The blank or the sheet is heated to obtain an interdiffusion between the steel substrate and the pre-coating and to give the steel a partly or totally austenitic structure. Then the blank or the sheet is hot stamped to obtain a part. The part is cooled by holding the part in a stamping tool so that the microstructure of the steel substrate includes, at least in a portion of the part, martensite or bainite.

公开(公告)号：US20200262490A1

公开(公告)日：2020-08-20

申请号：US15780824

申请日：2016-12-09

Applicant: ArcelorMittal

Inventor： Ivan Viaux

IPC: B62D25/20 ,  B62D21/03 ,  B62D25/02 ,  B62D29/00

Abstract: The vehicle underbody structure comprises a floor panel, at least one longitudinal beam extending in a longitudinal direction of the vehicle under said floor panel and at least one transversal beam extending in a transversal direction, substantially perpendicular to the longitudinal direction, above the floor panel, the floor panel extending transversally between two sides, the transversal beam comprising a transversal central end extending under a central area of said floor panel and a transversal side end extending at one of the sides of said floor panel, wherein the transversal beam comprising a central portion, extending between the central end and an intermediate part of the transversal beam, and an end portion, extending between the intermediate part and the side end, the resistance to plastic deformation of the central portion being greater than the resistance to plastic deformation of the end portion, and in that the intermediate part of the transversal beam extends upright of the longitudinal beam such that the end portion of the transversal beam extends transversally between the longitudinal beam and one of the sides of the floor panel.