公开(公告)号：EP2718469A1

公开(公告)日：2014-04-16

申请号：EP12722751.0

申请日：2012-05-17

申请人： Arcelormittal Investigación y Desarrollo SL

发明人： MBACKE, Papa Amadou Mactar ,  MOULIN, Antoine

IPC分类号： C21D1/20 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

CPC分类号： C23C2/02 ,  B23K11/11 ,  B32B15/013 ,  C21D1/20 ,  C21D8/0247 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10T428/12799

摘要： The invention relates to a TRIP steel plate, which is cold-rolled and annealed, which is formable and which has improved weldability, the strength of which is between 780 and 900 MPa, and the elongation at break of which is greater than 19%, wherein the composition thereof includes, the contents being expressed in weight percent: 0.17% ≤ C ≤ 0.25%, 1.5% ≤ Mn ≤ 2%, 0.5% ≤ Si ≤ 1%, and 0.5% ≤ Al ≤ 1.2%, it being understood that Si +Al ≥ 1.30%, the remainder of the composition consisting of iron and unavoidable impurities resulting from the production, the microstructure of the steel plate consisting of 65-85% of iron, 15-35% of islands of residual martensite and austenite, the mean size of said islands of residual martensite and austenite being less than 1.3 micrometers, and the mean form factor thereof being less than 3

公开(公告)号：EP2291547B1

公开(公告)日：2012-04-25

申请号：EP09761870.6

申请日：2009-05-15

申请人： Arcelormittal Investigación y Desarrollo SL

发明人： MOULIN, Antoine ,  HEBERT, Véronique ,  VINCI, Catherine ,  RESTREPO GARCES, Gloria ,  WATERSCHOOT, Tom ,  GOUNE, Mohamed

IPC分类号： C22C38/04 ,  C21D8/02 ,  C23C2/06 ,  C23C2/02

CPC分类号： C21D9/46 ,  B22D7/00 ,  B22D11/001 ,  C21D1/84 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/021 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/36

摘要： The invention relates to an annealed, cold-rolled, dual phase steel sheet having a strength of 980 to 1100 MPa and an elongation at break greater than 9%, comprising the following composition (as expressed in wt.-%): 0.055% ≤ C ≤ 0.095%, 2% ≤ Mn ≤ 2.6%, 0.005% ≤ Si ≤ 0.35%, S ≤ 0.005%, P ≤ 0.05%, 0.1 ≤ Al ≤ 0.3%, 0.05% ≤ Mo ≤ 0.25%, 0.2% ≤ Cr ≤ 0.5%, assuming that Cr
+ 2Mo ≤ 0.6%, Ni ≤ 0.1%, 0.01 ≤ Nb ≤ 0.04%, 0.01 ≤ Ti ≤ 0.050%, 0.0005 ≤ B ≤ 0.0025%, 0.002% ≤ N ≤ 0.007%, the remainder of the composition consisting of iron and inevitable impurities resulting from production.

公开(公告)号：EP2291547A1

公开(公告)日：2011-03-09

申请号：EP09761870.6

申请日：2009-05-15

申请人： Arcelormittal Investigación y Desarrollo SL

发明人： MOULIN, Antoine ,  SARDOY, Véronique ,  VINCI, Catherine ,  RESTREPO GARCES, Gloria ,  WATERSCHOOT, Tom ,  GOUNE, Mohamed

IPC分类号： C22C38/04 ,  C21D8/02 ,  C23C2/06 ,  C23C2/02

CPC分类号： C21D9/46 ,  B22D7/00 ,  B22D11/001 ,  C21D1/84 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/021 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/36

摘要： The invention relates to an annealed, cold-rolled, dual phase steel sheet having a strength of 980 to 1100 MPa and an elongation at break greater than 9%, comprising the following composition (as expressed in wt.-%): 0.055% ≤ C ≤ 0.095%, 2% ≤ Mn ≤ 2.6%, 0.005% ≤ Si ≤ 0.35%, S ≤ 0.005%, P ≤ 0.05%, 0.1 ≤ Al ≤ 0.3%, 0.05% ≤ Mo ≤ 0.25%, 0.2% ≤ Cr ≤ 0.5%, assuming that Cr
+ 2Mo ≤ 0.6%, Ni ≤ 0.1%, 0.01 ≤ Nb ≤ 0.04%, 0.01 ≤ Ti ≤ 0.050%, 0.0005 ≤ B ≤ 0.0025%, 0.002% ≤ N ≤ 0.007%, the remainder of the composition consisting of iron and inevitable impurities resulting from production.