公开(公告)号：US20180148806A1

公开(公告)日：2018-05-31

申请号：US15879944

申请日：2018-01-25

Applicant: ArcelorMittal France

Inventor： Pascal DRILLET ,  Damien ORMSTON

IPC: C21D8/02 ,  C23C2/12 ,  C23C2/06 ,  C21D6/00 ,  C23C2/02 ,  C22C38/38 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46

CPC classification number: C21D8/0263 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

Abstract: A hot-rolled steel sheet having a tensile strength greater than 800 MPa and an elongation at break greater than 10% is provided. A composition of the steel includes, the contents being expressed by weight: 0.050%≤C≤0.090%, 1%≤Mn≤2%, 0.015%≤Al≤0.050%, 0.1%≤Si≤0.3%, 0.10%≤Mo≤0.40%, S≤0.010%, P≤0.025%, 0.003%≤N≤0.009%, 0.12%≤V≤0.22%, Ti≤0.005%, Nb≤0.020% and optionally, Cr≤0.45%. A balance of the composition includes iron and inevitable impurities resulting from the smelting. A microstructure of the sheet or part includes, as a surface fraction, at least 80% upper bainite, and a remainder includes lower bainite, martensite and residual austenite. A sum of the martensite and residual austenite, as a surface fraction, is less than 5%.

公开(公告)号：US20180163282A9

公开(公告)日：2018-06-14

申请号：US14575475

申请日：2014-12-18

Applicant: ARCELORMITTAL FRANCE

Inventor： Pascal DRILLET ,  Damien ORMSTON

IPC: C21D8/02 ,  C21D9/46 ,  C21D6/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C22C38/38 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00

CPC classification number: C21D8/0263 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

Abstract: The invention relates to a hot-rolled steel sheet having a tensile strength greater than 800 MPa and an elongation at break greater than 10%, the composition of which comprises, the contents being expressed by weight: 0.050%≤C≤0.090%, 1%≤Mn≤2%, 0.015%≤Al≤0.050%, 0.1%≤Si≤0.3%, 0.10%≤Mo≤0.40%, S≤0.010%, P≤0.025%, 0.003%≤N≤0.009%, 0.12%≤V≤0.22%, Ti≤0.005%, Nb≤0.020% and, optionally, Cr≤0.45%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the sheet or the part comprising, as a surface fraction, at least 80% upper bainite, the possible complement consisting of lower bainite, martensite and residual austenite, the sum of the martensite and residual austenite contents being less than 5%.

公开(公告)号：US20150203932A1

公开(公告)日：2015-07-23

申请号：US14575475

申请日：2014-12-18

Applicant: ARCELORMITTAL FRANCE

Inventor： Pascal DRILLET ,  Damien ORMSTON

IPC: C21D8/02 ,  C21D6/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C22C38/00 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C21D9/46 ,  C22C38/38

CPC classification number: C21D8/0263 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

Abstract: The invention relates to a hot-rolled steel sheet having a tensile strength greater than 800 MPa and an elongation at break greater than 10%, the composition of which comprises, the contents being expressed by weight: 0.050%≦C≦0.090%, 1%≦Mn≦2%, 0.015%≦Al≦0.050%, 0.1%≦Si≦0.3%, 0.10%≦Mo≦0.40%, S≦0.010%, P≦0.025%, 0.003%≦N≦0.009%, 0.12%≦V≦0.22%, Ti≦0.005%, Nb≦0.020% and, optionally, Cr≦0.45%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the sheet or the part comprising, as a surface fraction, at least 80% upper bainite, the possible complement consisting of lower bainite, martensite and residual austenite, the sum of the martensite and residual austenite contents being less than 5%.

Abstract translation: 本发明涉及一种抗拉强度大于800MPa，断裂伸长率大于10％的热轧钢板，其组成包括：其含量按重量计：0.050％＆lt; 1E; C＆lt; lE; 0.090％ 1％＆nlE; Mn＆nlE; 2％，0.015％＆nlE; Al＆nlE; 0.050％，0.1％＆lt; NlE; Si＆NlE; 0.3％，0.10％＆nlE; Mo＆NlE; 0.40％，S＆lt; E; 0.010％，P＆NlE; 0.025％，0.003％ N＆amp; NlE; 0.009％，0.12％＆nlE; V＆lt; ll; 0.22％，Ti＆nlE; 0.005％，Nb＆nlE; 0.020％和任选的Cr＆nlE; 0.45％，由冶炼产生的铁和不可避免的杂质， 的片材或部分，作为表面部分，包含至少80％的上贝氏体，可能的补体由下贝氏体，马氏体和残余奥氏体组成，马氏体和残余奥氏体含量的总和小于5％。