公开(公告)号：US11371109B2

公开(公告)日：2022-06-28

申请号：US15526902

申请日：2015-11-17

Applicant: ArcelorMittal

Inventor： Artem Arlazarov ,  Kangying Zhu

IPC: C21D8/02 ,  C21D9/46 ,  C21D1/18 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C23C2/06 ,  C23C2/12 ,  C22C38/32 ,  C21D7/13 ,  C22C38/28 ,  C22C38/38 ,  C23C2/28 ,  C22C38/26 ,  C22C38/12 ,  C22C38/34 ,  C22C38/14

Abstract: A method for manufacturing a steel product includes providing a heated steel starting product at a temperature between 380° C. and 700° C., having a metastable fully austenitic structure, with a specified composition. Then the starting product is hot formed at a temperature between 700° C. and 380° C., with a cumulated strain εb between 0.1 and 0.7, in at least one location of the heated steel starting product, to obtain a fully austenitic hot-formed steel product; quenched by cooling the product down, at a cooling rate VR2 superior to the critical martensitic cooling rate, to a quenching temperature QT lower than Ms in order to obtain a structure containing between 40% and 90% of martensite, the rest of the structure being austenite; then maintained at, or reheated up to a holding temperature PT between QT and 470° C. and holding the product at the temperature PT for a duration Pt between 5 s and 600 s.

公开(公告)号：US11319626B2

公开(公告)日：2022-05-03

申请号：US16318563

申请日：2017-07-27

Applicant: ArcelorMittal

Inventor： Sergio Pace ,  Eric Silberberg ,  Dimitri Wilders ,  Rémy Bonnemann ,  Lucie Gaouyat

IPC: C23C14/24 ,  C23C14/02 ,  C23C14/14 ,  C23C14/56

Abstract: A vacuum deposition facility is provided for continuously depositing on a running substrate coatings formed from metal alloys including a main element and at least one additional element. The facility includes a vacuum deposition chamber and a substrate running through the chamber. The facility also includes a vapor jet coater, an evaporation crucible for feeding the vapor jet coater with a vapor having the main element and the at least one additional element, a recharging furnace for feeding the evaporation crucible with the main element in molten state and maintaining a constant level of liquid in the evaporation crucible, and a feeding unit being fed with the at least one additional element in solid state for feeding the evaporation crucible with the at least one additional element either in molten state, in solid state or partially in solid state. A process is also provided.

公开(公告)号：US20220120499A1

公开(公告)日：2022-04-21

申请号：US17284859

申请日：2018-10-22

Applicant: ArcelorMittal

Inventor： Michel PICARD ,  Sami-Alex ZAIMI ,  Dianbing HUANG ,  Mouna ABBANA BENNANI

IPC: F27D21/00 ,  F27D21/04 ,  F27B1/28 ,  F27D1/00

Abstract: A method for monitoring the wear of a refractory lining of a blast furnace using modelling of a part of the blast furnace and thermal field calculation. Computer program allowing to perform such a method.

公开(公告)号：US20220072658A1

公开(公告)日：2022-03-10

申请号：US17417265

申请日：2018-12-24

Applicant: ArcelorMittal

Inventor： Francis SCHMIT ,  Maria POIRIER ,  Cristian ALVAREZ ,  Lucille GOUTON ,  Thierry DAVID ,  Ivan VIAUX

IPC: B23K26/26 ,  B23K26/322

Abstract: A method for producing a welded steel blank (1) includes providing two precoated sheets (2), each comprising a steel substrate (3) having a precoating (5) on each of its two main faces (4), each sheet (2) comprising, on each main face (4), at a weld edge (14), a removal zone (18) in which the precoating (5) is removed over a removal fraction; and butt welding the sheets (2) using a filler wire (20) so as to create a weld joint (22) having an aluminum content AlWJ comprised between 0.1 wt. % and 1.2 wt. %. The composition of the wire (20) and the proportion of wire (20) added is such that the weld joint (22) has: (a) a quenching factor FTWJ such that FTWJ−0.96FTBM≥0, (b) a nickel content NiWJ≤14−3.4×AlWJ and a chromium content CrWJ≤5−2×AlWJ, where AlWJ is the aluminum content of the weld joint (22).

公开(公告)号：US20220056543A1

公开(公告)日：2022-02-24

申请号：US17276435

申请日：2018-09-09

Applicant: ARCELORMITTAL

Inventor： Sujay SARKAR

IPC: C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C23C2/06

Abstract: A hot rolled steel sheet having a chemical composition including, in weight %: 0.15%≤C≤0.20%, 0.50%≤Mn≤2.00%, 0.25%≤Si≤1.25%, 0.10%≤Al≤1.00%, with 1.00%≤(Al+Si)≤2.00%, 0.001%≤Cr≤0.250%, P≤0.02%, S≤0.005%, N≤0.008%, and optionally one or more elements among: 0.005%≤Mo≤0.250%, 0.005%≤V≤0.250%, 0.0001%≤Ca≤0.003% and 0.001%≤Ti≤0.025%, the remainder being Fe and unavoidable impurities, and wherein the microstructure includes in surface fraction, ferrite and bainite, the sum of which being greater than 5% and strictly lower than 20%, the remainder consisting of tempered martensite.

公开(公告)号：US20220025478A1

公开(公告)日：2022-01-27

申请号：US17297292

申请日：2019-12-02

Applicant: ArcelorMittal

Inventor： Irène DE DIEGO CALDERON ,  Jean-Christophe HELL

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

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

公开(公告)号：US20220017987A1

公开(公告)日：2022-01-20

申请号：US17491785

申请日：2021-10-01

Applicant: ArcelorMittal

Inventor： Pascal Drillet ,  Maria Poirier ,  Sujay Sarkar

IPC: C21D9/46 ,  B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B21D22/02 ,  C21D1/673 ,  C21D8/02 ,  C22C38/46 ,  C22C38/44 ,  C22C38/50 ,  C22C38/54 ,  C22C38/48 ,  C22C21/02 ,  B23K26/21 ,  B21B1/22 ,  C21D6/00 ,  C22C38/22 ,  C23C2/12

Abstract: A press hardened steel part is provided. The steel of the part has a chemical composition including, in weight: 0.062%≤C≤0.095%, 1.4%≤Mn≤1.9%, 0.2%≤Si≤0.5%, 0.020%≤Al≤0.070%, 0.02%≤Cr≤0.1%, wherein: 1.5%≤(C+Mn+Si+Cr)≤2.7%, 0.040%≤Nb≤0.060%, 3.4×N≤Ti≤8×N wherein: 0.044%≤(Nb+Ti)≤0.090%, 0.0005≤B≤0.004%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%, optionally: 0.0001%≤Ca≤0.003%, and the remainder being Fe and unavoidable impurities. The microstructure of the part includes, in a majority of the part, in surface fractions: less than 40% of bainite, less than 5% of austenite, less than 5% of ferrite, and a remainder being martensite. The martensite is fresh martensite and self-tempered martensite.

公开(公告)号：US20220002833A1

公开(公告)日：2022-01-06

申请号：US17470257

申请日：2021-09-09

Applicant: ArcelorMittal

Inventor： Emmanuel DECHASSEY ,  Christophe SILVY-LELIGOIS ,  Francisco CHICHARRO HERRANZ ,  Vicente POLO MESTRE ,  Marie-Christine THEYSSIER ,  Thierry CELOTTO ,  Christine KACZYNSKI ,  Thomas DUPUY ,  Quang-Tien NGO

IPC: C21D9/46 ,  B21B15/00 ,  B23K11/00 ,  B23K11/04 ,  B23K26/20 ,  C21D8/02 ,  C21D9/50 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23G1/00

Abstract: A steel sheet that is welded and then cold rolled to a thickness between 0.5 mm and 3 mm, the deformation ratio created by cold rolling in the base metal is equal to εMB, for which the deformation ratio created by the cold rolling in the welded joint is equal to εS, where: 0.4 ≤ ɛS ɛ ⁢ M ⁢ B

公开(公告)号：US20210395853A1

公开(公告)日：2021-12-23

申请号：US17463128

申请日：2021-08-31

Applicant: ArcelorMittal

Inventor： Tiago MACHADO AMORIM ,  Christian ALLELY ,  Raisa GRIGORIEVA ,  David DUSSAUSSOIS

IPC: C21D9/46 ,  B32B15/01 ,  C23C2/12 ,  C23C2/28 ,  C22C21/10 ,  C23C2/40 ,  C23C2/26 ,  C21D1/673 ,  C22C21/02 ,  B21D22/02 ,  C21D6/00 ,  C21D8/00

Abstract: A hot formed pre-coated steel part includes a steel sheet precoated with a metallic coating and hot formed, the coating including: 2.0 to 24.0% by weight of zinc; 1.1 to 7.0% by weight of silicon; optionally from 0.5 to 3.0% by weight of magnesium when the amount of silicon is between 1.1 and 4.0%, and optionally additional elements chosen from Pb, Ni, Zr or Hf, a content by weight of each additional element being less than 0.3% by weight, a balance being aluminum, unavoidable impurities and residual elements resulting from feeding ingots or from a passage of the steel sheet in a molten bath; and a ratio Al/Zn by weight greater than 2.9, where a microstructure in the steel after said hot forming being martensitic or martensitic-bainitic or made of at least 75% of equiaxed ferrite, 5 to 20% of martensite and bainite in an amount less than or equal to 10%.

公开(公告)号：US11198981B2

公开(公告)日：2021-12-14

申请号：US16757917

申请日：2018-12-11

Applicant: ARCELORMITTAL

Inventor： Claudia Cofano ,  Michael Gremling

IPC: E01F15/04 ,  E01F8/00 ,  E01F15/14 ,  E01F15/08

Abstract: A protection device (5a) for motorcyclists, adapted to be secured to a road safety barrier (1) with a plurality of poles (3) regularly spaced out, the protection device (5a) including a longitudinal beam (6a) and a spacer (7a) extending longitudinally alongside the rear side of at least one part of the beam (6a) and adapted to be secured to the poles, wherein the beam (6a) and the spacer (7a) are assembled together so as to define, in the part of the beam, a longitudinal damping volume (V) with a closed cross-section.