公开(公告)号：US11131011B2

公开(公告)日：2021-09-28

申请号：US16356231

申请日：2019-03-18

Applicant: ArcelorMittal

Inventor： Colin Scott ,  Philippe Cugy

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/04 ,  C21D9/48 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  B32B15/01 ,  C21D8/00 ,  C22C38/00 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C25D7/06 ,  C21D1/673

Abstract: A hot-rolled or cold-rolled steel plate having a composition including, in weight percent: 0.6%≤C≤0.9%; 17%≤Mn≤22%; 0.2%≤Al≤0.9%; 0.2%≤Si≤1.1%; with 0.85%≤Al+Si≤1.6%; 1.2%≤Cu≤1.7%; S≤0.030%; P≤0.080%; N≤0.1%; 0

公开(公告)号：US09873931B2

公开(公告)日：2018-01-23

申请号：US14553033

申请日：2014-11-25

Applicant: ARCELORMITTAL

Inventor： Mohamed Bouzekri ,  Michel Faral ,  Colin Scott

IPC: C22C38/04 ,  C22C38/58 ,  C21D8/02 ,  C22C38/02 ,  H01M4/86 ,  H01M4/88 ,  H01M4/90 ,  H01M4/92 ,  H01M8/0232 ,  B21B3/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  H01M8/1004

CPC classification number: C22C38/58 ,  B21B3/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/8817 ,  H01M4/8853 ,  H01M4/8892 ,  H01M4/9075 ,  H01M4/925 ,  H01M8/0232 ,  H01M8/1004 ,  Y02E60/50 ,  Y02P70/56

Abstract: A hot-rolled austenitic iron/carbon/manganese steel sheet is provided. The strength of which is greater than 900 MPa, the product (strength (in MPa)×elongation at fracture (in %)) of which is greater than 45000 and the chemical composition of which includes, the contents being expressed by weight 0.5%≦C≦0.7%, 17%≦Mn≦24%, Si≦3%, Al≦0.050%, S≦0.030%, P≦0.080% and N≦0.1%. A remainder of the composition includes iron and inevitable impurities resulting from the smelting. A recrystallized fraction of the structure of the steel is greater than 75%, a surface fraction of precipitated carbides of the steel is less than 1.5% and a mean grain size of the steel is less than 18 microns. A reinforcing element is also provided.

公开(公告)号：US20190292616A1

公开(公告)日：2019-09-26

申请号：US16302969

申请日：2017-05-19

Applicant: ARCELORMITTAL

Inventor： Colin Scott ,  Blandine REMY

IPC: C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/16 ,  C22C38/12 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C21D9/46 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/38

Abstract: A TWIP steel sheet is provided having an austenitic matrix including by weight: 0.1≤C≤1.2%, 13.0≤Mn 0.25%, and on a purely optional basis, one or more of Nb≤0.5%, B≤0.005%, Cr≤1.0%, Mo≤0.40%, Ni≤1.0%, Ti≤0.5%, and/or 0.06≤Sn≤0.2%, the remainder of the composition being made of iron and inevitable impurities resulting from elaboration.

公开(公告)号：US10131964B2

公开(公告)日：2018-11-20

申请号：US14672906

申请日：2015-03-30

Applicant: ARCELORMITTAL FRANCE ,  THYSSENKRUPP STEEL EUROPE AG

Inventor： Colin Scott ,  Philippe Cugy ,  Christian Allely

IPC: C22C38/02 ,  C21D9/46 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C28/02 ,  C21D1/26 ,  C21D1/42 ,  C21D1/767 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/06 ,  B32B15/01

Abstract: An austenitic steel sheet excellent in resistance to delayed cracking is provided. The composition of said steel comprises in weight: 0.35%≤C≤1.05% 15%≤Mn≤26% Si≤3% Al≤0.050% S≤0.030% P≤0.080% N≤0.1%, at least one metallic element X chosen among vanadium, titanium, niobium, molybdenum, chromium 0.050%≤V≤0.50%, 0.040%≤Ti≤0.50% 0.070%≤Nb≤0.50% 0.14%≤Mo≤2% 0.070%≤Cr≤2%. The composition may optionally include B, Ni and/or Cu. The remainder of the composition includes iron and unavoidable impurities inherent to fabrication, including hydrogen. The quantity Xp of the at least one metallic element under the form of carbides, nitrides or carbonitrides is, in weight: 0.030%≤Vp≤0.40% 0.030%≤Tip≤0.50% 0.040%≤Nbp≤0.40% 0.14%≤Mop≤0.44% 0.070%≤Crp≤0.6%. The hydrogen content Hmax designating the maximal hydrogen content that can be measured from a series of at least five specimens, and the quantity Xp, in weight, is such that: 1000 ⁢ H max X P ≤ 3.3 .

公开(公告)号：US10006099B2

公开(公告)日：2018-06-26

申请号：US14858276

申请日：2015-09-18

Applicant: ARCELORMITTAL ,  THYSSENKRUPP STEEL EUROPE AG

Inventor： Colin Scott ,  Philippe Cugy ,  Christian Allely

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C21D9/46 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C28/02 ,  C21D1/26 ,  C21D1/42 ,  C21D1/767 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/06 ,  B32B15/01

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D1/26 ,  C21D1/42 ,  C21D1/767 ,  C21D6/001 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C28/028 ,  Y02P10/253 ,  Y10T428/12799

Abstract: A process for fabricating a steel sheet is provided. The process includes soaking a steel sheet. The steel has a composition including iron, carbon, manganese, silicon, aluminum, sulfur, phosphorus and nitrogen and at least one metallic element X chosen among vanadium, titanium, niobium, molybdenum, and chromium. A quantity Xp of metallic element under the form of carbides, nitrides or carbonitrides is, by weight: 0.030%≤Vp≤0.40%; 0.030%≤Tip≤0.50%; 0.040%≤Nbp≤0.40%; 0.14%≤Mop≤0.44%; or 0.070%≤Crp≤0.6%. The soaking step occurs under a pure nitrogen or argon atmosphere with a dew point lower than −30° C. at a soaking temperature θ between 250 and 900° C. and with a dynamic circulation of a regenerated atmosphere.