公开(公告)号：US11512362B2

公开(公告)日：2022-11-29

申请号：US17087019

申请日：2020-11-02

Applicant: ArcelorMittal

Inventor： Olga A. Girina ,  Damon Panahi

IPC: C21D9/46 ,  C21D1/22 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C22C38/00 ,  C23C2/02 ,  B32B15/04 ,  C22C38/44 ,  C23C2/26 ,  C23C30/00 ,  C22C38/18 ,  B32B15/01 ,  C22C38/12 ,  C23C2/34 ,  B32B15/18 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38

Abstract: A method for producing a coated steel sheet having a tensile strength TS of at least 1450 MPa and a total elongation TE of at least 17% includes the successive steps of providing a cold rolled steel sheet made of a steel having a chemical composition comprising, in weight %: 0.34%≤C≤0.45%, 1.50%≤Mn≤2.30%, 1.50≤Si≤2.40%, 0%

公开(公告)号：US11499528B2

公开(公告)日：2022-11-15

申请号：US16627461

申请日：2017-06-30

Applicant: ArcelorMittal

Inventor： Beatriz Ventura Garcia ,  Elena Di Silvestro ,  Emilie Dupont

IPC: F03D13/20

Abstract: A mast section (1) for a wind turbine having a longitudinal central axis (L) extending along a longitudinal direction includes at least two tubular mast elements (14) stacked along the longitudinal direction and arranged edge-to-edge at a joining plane (P). Each mast element (14) includes at least two wall segments (16), connected to one another by segment connectors (26) extending along longitudinal edges of the wall segments (16). The mast section (1) further includes element connectors (37) each extending astride the two mast elements (14), in the extension of the segment connectors (26) in the longitudinal direction. The mast section (1) further includes a plurality of element overconnectors (45), each element overconnector (45) extending astride a segment connector (26) and an adjacent element connector (37) in the longitudinal direction.

公开(公告)号：US11492676B2

公开(公告)日：2022-11-08

申请号：US16931001

申请日：2020-07-16

Applicant: ARCELORMITTAL

Inventor： Rashmi Ranjan Mohanty ,  Hyun Jo Jun ,  Dongwei Fan

IPC: C21D9/46 ,  B32B15/01 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  C21D8/02 ,  C21D1/18 ,  C22C38/02 ,  C22C38/38 ,  C22C38/34 ,  C22C38/06 ,  C22C38/58

Abstract: A method is for producing a high strength coated steel sheet having a yield stress YS>800 MPa, a tensile strength TS>1180 MPa, and improved formability and ductility. The steel contains: 15%≤C≤0.25%, 1.2%≤Si≤1.8%, 2%≤Mn≤2.4%, 0.1%≤Cr≤0.25%, Al≤0.5%, the remainder being Fe and unavoidable impurities. The sheet is annealed at a temperature higher than Ac3 and lower than 1000° C. for a time of more than 30 s, then quenched by cooling it to a quenching temperature QT between 250° C. and 350° C., to obtain a structure consisting of at least 60% of martensite and a sufficient austenite content such that the final structure contains 3% to 15% of residual austenite and 85% to 97% of martensite and bainite without ferrite, then heated to a partitioning temperature PT between 430° C. and 480° C. and maintained at this temperature for a partitioning time Pt between 10 s and 90 s, then hot dip coated and cooled to the room temperature.

公开(公告)号：US11486017B2

公开(公告)日：2022-11-01

申请号：US16302977

申请日：2017-05-23

Applicant: ARCELORMITTAL

Inventor： Michel Soler ,  Ian Alberto Zuazo Rodriguez ,  Irène De Diego Calderon

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

Abstract: A cold rolled and annealed steel sheet includes by weight: 0.6

公开(公告)号：US11466335B2

公开(公告)日：2022-10-11

申请号：US16069804

申请日：2017-01-17

Applicant: ArcelorMittal

Inventor： Elena Uta ,  Veronique Hebert

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

Abstract: A cold rolled and heat treated steel sheet is provided. The steel sheet includes a composition including 0.17%≤carbon≤0.24%, 1.9%≤manganese≤2.2%, 0.5%≤aluminum≤1.2%, 0.5%≤silicon≤1%, Si+Al≥1.3%, 0.05%≤chromium≤0.2%, 0.015%≤niobium≤0.03%, sulphur≤0.003%, phosphorus≤0.03% and optionally 0.005%≤titanium≤0.05%, 0.001%≤molybdenum≤0.05%, a remainder of the composition including iron and the unavoidable impurities. A microstructure of the coated steel sheet includes, in area fraction, 10 to 20% residual austenite, said austenite phase having a carbon content between 0.9 to 1.1%, 40 to 55% polygonal ferrite, 15 to 40% granular bainite and at least 5% tempered martensite, a sum of tempered martensite and residual austenite being between 20 to 30%. A method is also provided.

公开(公告)号：US20220298598A1

公开(公告)日：2022-09-22

申请号：US17835347

申请日：2022-06-08

Applicant: ArcelorMittal

Inventor： Rashmi Ranjan MOHANTY ,  Hyun Jo JUN ,  Dongwei FAN ,  Pavan K. C. VENKATASURYA

IPC: C21D9/46 ,  C22C38/06 ,  C22C38/14 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C21D9/48 ,  C21D1/19 ,  C21D8/04 ,  C21D1/18 ,  C21D6/00

Abstract: A steel sheet made of a steel having a chemical composition containing in weight %: 0.13%≤C≤0.22%, 1.2%≤Si≤1.8%, 1.8%≤Mn≤2.2%, 0.10%≤Mo≤0.20%, Nb≤0.05%, Ti≤0.05%, Al≤0.5%, a remainder being Fe and unavoidable impurities. The steel sheet has a yield strength of at least 850 MPa, a tensile strength of at least 1180 MPa, a total elongation of at least 13% and a hole expansion ratio HER of at least 30%.

公开(公告)号：US11434541B2

公开(公告)日：2022-09-06

申请号：US16332619

申请日：2017-09-15

Applicant: ArcelorMittal

Inventor： Coralie Magar ,  Kangying Zhu ,  Astrid Perlade

IPC: C21D8/02 ,  B23K11/11 ,  C21D1/18 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40

Abstract: A cold-rolled and heat-treated steel sheet, having a composition including, by weight percent: 0.10%≤C≤0.40%, 3.5%≤Mn≤8.0%, 0.5%≤Si≤2.5%, 0.003%≤Al≤3.0%, with Si+Al≥0.8%, 0.001%≤Mo≤0.5%, S≤0.010%, P≤0.020%, N≤0.008%, and optionally one or more elements selected from a group comprising Cr, Ti, Nb, V and B, such that: 0.01%≤Cr≤2.0%, 0.010%≤Ti≤0.080%, 0.010%≤Nb≤0.080%, 0.010%≤V≤0.30%, 0.0005%≤B≤0.003%, the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The microstructure includes, in surface fraction, between 10% and 50% of retained austenite, at most 8% of fresh martensite, and tempered martensite. The retained austenite includes Mn-enriched austenite, having a Mn content higher than 1.3*Mn %, Mn % designating the Mn content of the steel sheet, a surface fraction of the Mn-enriched austenite with respect to the whole microstructure is between 2% and 12%, and Mn-poor austenite, having an Mn content between 0.5*Mn % and 1.3*Mn %.

公开(公告)号：US11414721B2

公开(公告)日：2022-08-16

申请号：US16302982

申请日：2017-05-18

Applicant: ARCELORMITTAL

Inventor： Nicolas Charbonnier ,  Gerard Petitgand ,  Sebastien Allain ,  Marie-Christine Theyssier

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C23C2/06 ,  C22C38/02 ,  C22C38/06 ,  C23C2/02 ,  C23C2/40 ,  C22C38/12 ,  C22C38/16 ,  C23C2/12 ,  C22C38/04 ,  C22C38/00 ,  C21D8/04 ,  B32B15/01 ,  C22C38/20 ,  C22C38/24 ,  C22C38/38 ,  C23F17/00

Abstract: A method for the manufacture of a TWIP steel is provided including: (A) feeding of a slab comprising by weight: 0.5

公开(公告)号：US11408049B2

公开(公告)日：2022-08-09

申请号：US16596137

申请日：2019-10-08

Applicant: ARCELORMITTAL WIRE FRANCE

Inventor： Sylvain Foissey ,  Gaëlle Bascourt

IPC: C21D9/52 ,  C21D1/30 ,  C22C38/04 ,  C22C38/44 ,  C21D1/18 ,  C22C38/00 ,  C22C38/40 ,  C21D8/06 ,  C21D1/26 ,  C22C38/18 ,  C22C38/22 ,  B21F1/00 ,  C21D1/20 ,  C21D1/42 ,  C21D1/60 ,  C21D1/607 ,  C21D9/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  E21B17/01

Abstract: A cold rolled steel wire having the following chemical composition expressed in percent by weight, 0.2≤C %≤0.6, 0.5≤Mn %≤1.0, 0.1≤Si≤0.5%, 0.2≤Cr≤1.0%, P≤0.020%, S≤0.015%, N≤0.010%, and optionally not more than 0.07% Al, not more than 0.2% Ni, not more than 0.1% Mo and not more than 0.1% Cu, the balance being iron and the unavoidable impurities due to processing. This wire has a microstructure including bainite and, optionally, up to 35% acicular ferrite and up to 15% pearlite. A fabrication method and flexible conduits for hydrocarbon extraction are also provided.

公开(公告)号：US20220244146A1

公开(公告)日：2022-08-04

申请号：US17612788

申请日：2020-04-17

Applicant: ArcelorMittal

Inventor： Akshay BANSAL ,  Gérard GRIFFAY ,  Vladislav JANECEK

IPC: G01N1/22 ,  G01N1/02 ,  G01N19/10

Abstract: A method for detecting the presence of humidity on a surface of a flat strip, in particular a bare metal strip or of a coated metal strip having the following steps: blowing on the surface an impinging air flow producing an air flow deflected by the surface, the impinging air flow not being saturated, measuring a humidity content of at least a portion of the deflected air flow, comparing the humidity content of the impinging air flow and the deflected air flow, if said humidity content of the deflected air flow is superior to the humidity content of the impinging air flow, the presence of humidity on the surface of the bare metal strip or of the coated metal strip is detected.