公开(公告)号：US20200009679A1

公开(公告)日：2020-01-09

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

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：US20200001402A1

公开(公告)日：2020-01-02

申请号：US16569267

申请日：2019-09-12

Applicant: ArcelorMittal

Inventor： Francis SCHMIT ,  Rene VIERSTRAETE ,  Qingdong YIN ,  Wolfram EHLING

IPC: B23K26/60 ,  B23K26/26 ,  B23K26/322 ,  B23K26/32

Abstract: A method for the preparation of steel sheets for fabricating a welded steel blank is provided. The method includes procuring at least two pre-coated steel sheets, each having a pre-coating of an intermetallic alloy layer, topped by a layer of aluminum metal or aluminum alloy or aluminum-based alloy. The sheets have a principal face, an opposite principal face, and at least one secondary face. The sheets are positioned so a gap between 0.02 and 2 mm exists between the secondary faces. The secondary faces face each other. The positioning of the first and second sheets defines a median plane perpendicular to the principal faces. Layers of metal alloy are removed by melting and vaporization simultaneously on the principal faces, in a peripheral zone of the sheets, the peripheral zones being the zones of the principal faces closest in relation to the median plane.

公开(公告)号：US20190292617A1

公开(公告)日：2019-09-26

申请号：US16302974

申请日：2017-05-22

Applicant: ARCELORMITTAL

Inventor： Thierry IUNG ,  Gerard PETITGAND

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

Abstract: A method for the manufacture of a cold rolled, recovered TWIP steel sheet coated with a metallic coating is provided including the following steps: (A) the feeding of a slab having the following composition : 0.1

公开(公告)号：US20190276909A1

公开(公告)日：2019-09-12

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 ,  C21D8/02 ,  C21D6/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00 ,  C21D1/26

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

公开(公告)号：US20190276095A1

公开(公告)日：2019-09-12

申请号：US16346467

申请日：2017-11-21

Applicant: ArcelorMittal

Inventor： Jimmy LAM ,  Joël WILSIUS ,  Nicolas SCHNEIDER

IPC: B62D29/00 ,  B62D33/06 ,  B62D25/06 ,  B62D25/20 ,  B62D27/02 ,  B62D65/02 ,  B32B15/01 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B21D22/02

Abstract: The reinforcement member includes a body made of a press hardened steel having a tensile strength greater or equal to 1200 MPa. The body is coated with a zinc-based coating or with an aluminum-based coating and extends along a main direction. The reinforcement member also includes at least one tab extending from the body along a transversal direction forming a non-zero angle with the main direction. The bend between the body and the tab defines an intrados and an extrados. The tab is made of a cold bent part of the body, and the elongation of the extrados is between 10% and 25%.

公开(公告)号：US20190271058A1

公开(公告)日：2019-09-05

申请号：US16414022

申请日：2019-05-16

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique Spehner ,  Ronald Kefferstein

IPC: C21D9/46 ,  C23C2/40 ,  C23C2/26 ,  C23C2/12 ,  B32B15/01

Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.

公开(公告)号：US20190242006A1

公开(公告)日：2019-08-08

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 ,  C23C14/56 ,  C23C14/02 ,  C23C14/14

CPC classification number: C23C14/246 ,  C23C14/021 ,  C23C14/14 ,  C23C14/562

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：US20190226062A1

公开(公告)日：2019-07-25

申请号：US16312528

申请日：2016-12-23

Applicant: ARCELORMITTAL POLAND S.A. ,  INSTYTUT METALURGII ZELAZA IM.ST.STASZICA

Inventor： Tomasz ZYGMUNT ,  Janusz KASPROWICZ ,  Tomasz DZIERZAWCZYK ,  Stanislaw WOJCIK ,  Roman KUZIAK ,  Wladyslaw ZALECKI ,  Ryszard MOLENDA ,  Krzysztof RADWANSKI ,  Andrzej WROZYNA

IPC: C22C38/54 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/44 ,  C22C38/50

Abstract: Object of the invention is multi-phase steel, used for production of standard-gauge rails, characterized by the fact that the content of basic elements in the steel is no less than: C—0.15% wt, Si—0.60% wt, Mn—1.20% wt, Cr—1.20% wt, Ni—0.20% wt, Mo—0.10% wt, and additionally contains: Ti—0.01-0.25% wt, satisfying the relationship (% wt Mo)/(% mas. Ti)>1; Al—0.01-0.80% wt; B—0.001-0.003% wt., H2≤2 ppm, N≤80 ppm, volume of individual constituents is in relation to the total weigh of multiphase steel.

公开(公告)号：US20190226060A1

公开(公告)日：2019-07-25

申请号：US16276242

申请日：2019-02-14

Applicant: ArcelorMittal

Inventor： Kangying Zhu ,  Olivier Bouaziz

IPC: C22C38/38 ,  C21D1/673 ,  C22C38/34 ,  C22C38/06 ,  C22C38/02 ,  C21D8/02 ,  C22C38/22 ,  C21D1/19 ,  C22C38/04 ,  C22C38/18 ,  C21D9/46 ,  C21D7/13

Abstract: The present invention provides a method for the fabrication of a steel sheet with a completely martensitic structure which has an average lath size of less than 1 micrometer and an average elongation factor of the laths is between 2 and 5. The elongation factor of a lath is defined as a maximum dimension lmax divided by and a minimum dimension lmin. The steel sheet has a yield stress greater than 1300 MPa and a mechanical strength greater than (3220(C)+958) megapascals. A composition of a semi-finished steel product includes, expressed in percent by weight, is, 0.15%≤C≤0.40%, 1.5%≤Mn≤3%, 0.005%≤Si≤2%, 0.005%≤Al≤0.1%, 1.8%≤Cr≤4%, 0%≤Mo≤2%, whereby: 2.7% 0.5 (Mn)+(Cr)+3(Mo)≤5.7%, S≤0.05%, P≤0.1%, optionally: 0%≤Nb≤0.050%, 0.01%≤Ti≤0.1%, 0.0005%≤B≤0.005%, 0.0005%≤Ca≤0.005%. The semi-finished product is reheated to a temperature T1 in the range between 1050° C. and 1250° C., then subjected to a roughing rolling at a temperature T2 in the range between 1000 and 880° C., with a cumulative rate of reduction εa greater than 30%, to obtain a sheet with a completely recrystallized austenitic structure with an average grain size less than 40 micrometers and preferably less than 5 micrometers. The sheet is then partially cooled to prevent a transformation of the austenite at a rate VR1 greater than 2° C./s to a temperature T3 between 600° C. and 400° C. in the metastable austenitic range, and subjected to a finishing hot rolling at the temperature T3 of the partially cooled sheet, with a cumulative rate of reduction εb greater than 30% to obtain a sheet that is then cooled at a rate VR2 which is greater than the critical martensitic quenching rate.

公开(公告)号：US20190217902A1

公开(公告)日：2019-07-18

申请号：US15780079

申请日：2016-12-09

Applicant: ArcelorMittal

Inventor： Ivan Viaux ,  Florin Arnautu

IPC: B62D25/20 ,  B62D21/03 ,  B62D29/00 ,  B62D27/02 ,  C22C38/32 ,  C22C38/50 ,  C22C38/48 ,  C22C38/06 ,  C22C38/58 ,  C22C38/02 ,  C22C38/00

Abstract: A vehicle underbody structure containing a floor panel, at least one longitudinal beam extending in a longitudinal direction of the vehicle under said floor panel and at least one lowerside sill part extending in the longitudinal direction adjacent to the floor panel, and at least one reinforcement element extending in a transversal direction, substantially perpendicular to the longitudinal direction, said reinforcement element made of a press hardened steel part having a tensile strength higher or equal to 1200 MPa and extending under the floor panel and being attached at one of its transversal ends to the longitudinal beam and at the other of its transversal ends to the lowerside sill part is provided. A vehicle body including the vehicle underbody structure is also provided.