公开(公告)号：US20180371597A1

公开(公告)日：2018-12-27

申请号：US16064195

申请日：2016-11-08

申请人： VOESTALPINE STAHL GMBH ,  TOYOTA MOTOR EUROPE NV/SA

发明人： Thomas HEBESBERGER ,  Florian WINKELHOFER ,  Markus ANZENBERGER ,  Edip Oze ARMAN

IPC分类号： C23C2/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C23C2/06 ,  C23C2/02 ,  C21D8/02

摘要： A high strength galvannealed steel sheet having, a) a composition consisting of the following elements (in wt. %): C 0.10-0.2 Mn 2.0-3.0 Si 0.2-0.5 Cr 0.1-0.7 Ti 0.01-0.07 Al≤0.2 Nb

公开(公告)号：US20220112586A1

公开(公告)日：2022-04-14

申请号：US17423742

申请日：2019-11-28

申请人： VOESTALPINE STAHL GMBH

发明人： Florian WINKELHOFER ,  Thomas HEBESBERGER ,  Martin GRUBER ,  Johannes REHRL

IPC分类号： C22C38/58 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/48 ,  C22C38/54 ,  C22C38/00 ,  C22C38/06 ,  C22C38/02 ,  C21D8/02

摘要： The invention relates to a cold rolled steel sheet having a composition consisting of (in wt. %): C 0.15-0.25; Si 0.5-1.6; Mn 2.2-2.8; Cr≤0.8; Mo≤0.2; Al 0.03-1.0; Nb≤0.04; V≤0.04; Ti 0.02-0.04; B 0.001-0.005; balance Fe apart from impurities, wherein the impurity contents of Cu and Ni are limited to ≤0.15, the cold rolled steel has a multiphase microstructure comprising a matrix of bainitic ferrite and ≤10 vol. % polygonal ferrite and the tensile strength (Rm) is 980-1500 MPa.

公开(公告)号：US20220112575A1

公开(公告)日：2022-04-14

申请号：US17423762

申请日：2019-11-28

申请人： VOESTALPINE STAHL GMBH

发明人： Johannes REHRL ,  Martin GRUBER ,  Florian WINKELHOFER ,  Thomas HEBESBERGER

IPC分类号： C21D9/52 ,  B32B15/01 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/42 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/04 ,  C21D6/00

摘要： A cold rolled steel strip or sheet has a composition consisting of (in wt. %): C 0.15-0.25; Si 0.5-1.6; Mn 2.2-3.2; Cr≤0.8; Mo≤0.2; Al 0.03-1.0; Nb≤0.04; V≤0.04; Ti 0.01-0.04; B 0.001-0.010; TUB 5-30; Cu≤0.15; Ni≤0.15; Ca≤0.01; balance Fe apart from impurities, where the cold rolled steel has a multiphase microstructure comprising a matrix mainly composed of tempered martensite and has a tensile strength (Rm) of at least 1380 MPa.

公开(公告)号：US20220010827A1

公开(公告)日：2022-01-13

申请号：US17289569

申请日：2019-11-28

申请人： VOESTALPINE STAHL GMBH

发明人： Florian WINKELHOFER ,  Thomas HEBESBERGER ,  Martin GRUBER

IPC分类号： F16B5/08 ,  B23K11/11 ,  B23K11/20

摘要： A resistance spot welded joint of at least two steel sheets and a method of producing a resistance spot welded joint of at least two steel sheets, wherein at least one of the steel sheets is provided with a Zn containing layer, the steel sheet has a tensile strength of at least 980 MPa, a multiphase microstructure comprising bainite, bainitic ferrite and tempered martensite in a total amount of at least of 75 volume % and retained austenite in an amount of 3-20 volume % and wherein the steel sheet provided with the Zn containing layer has a composition consisting of (in wt. %): C 0.1-0.3; Si 0.2-3.0; Mn 1.0-3.0; Cr≤2.0; Mo≤0.5; Al≤2.0; Nb≤0.2; V≤0.2; Ti 0.01-0.15; B 0.0005-0.01; and balance Fe apart from impurities, wherein the heat affected zone in the spot welded joint is free from cracks having a length of more than 500 μm.

公开(公告)号：US20190352750A1

公开(公告)日：2019-11-21

申请号：US16461689

申请日：2017-11-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  VOESTALPINE STAHL GMBH

发明人： Thomas HEBESBERGER ,  Florian WINKELHOFER ,  Michael SCHWARZENBRUNNER ,  Edip Ozer ARMAN

IPC分类号： C22C38/18 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

摘要： A high strength cold rolled steel sheet has a composition consisting of the following elements (in wt. %): C 0.07-0.15, Mn 2.3-3.2, Si 0.6-1.2, Cr 0.05-0.5, Al≤0.2 Nb≤0.1, balance Fe apart from impurities, a multiphase microstructure comprising a matrix of bainitic ferrite, and a tensile strength (Rm) of 980-1100 MPa.