公开(公告)号：US20150023835A1

公开(公告)日：2015-01-22

申请号：US14361270

申请日：2012-11-28

Applicant: ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO, S.L.

Inventor： Rongjie Song ,  Narayan S. Pottore

IPC: C22C38/14 ,  C22C38/00 ,  C22C38/04 ,  C22C38/02 ,  C22C38/12 ,  C22C38/06

Abstract: Martensitic steel compositions and methods of production thereof are provided. More specifically, a martensitic steel having tensile strengths ranging from 1700 to 2200 MPa are provided. Most specifically, the present invention provides thin gage (thickness of ≦1 mm) ultra high strength steel with an ultimate tensile strength of 1700 to 2200 MPa and methods of production thereof.

Abstract translation: 提供马氏体钢组合物及其生产方法。 更具体地说，提供拉伸强度为1700〜2200MPa的马氏体钢。 最具体地说，本发明提供极限拉伸强度为1700〜2200MPa的薄规格（厚度为nlE; 1mm）的超高强度钢及其制造方法。

公开(公告)号：US11319620B2

公开(公告)日：2022-05-03

申请号：US16570313

申请日：2019-09-13

Applicant: ArcelorMittal

Inventor： Rongjie Song ,  Narayan S. Pottore

IPC: C22C38/14 ,  C22C38/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C21D6/00

Abstract: A martensitic steel alloy is provided. The martensitic steel alloy includes carbon from 0.22 to 0.36 wt. %, manganese from 0.5% to 2.0% wt. %, and chromium in an amount less than 0.10 wt. %. and a carbon equivalent Ceq of less than 0.44 in which Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. Ceq is the carbon equivalent, C, Mn, Cr, Mo, V, Ni, and Cu are in wt. % of the elements in the alloy. The alloy has an ultimate tensile strength of at least 1700 MPa.

公开(公告)号：US10196705B2

公开(公告)日：2019-02-05

申请号：US15103275

申请日：2013-12-11

Applicant: ArcelorMittal

Inventor： Rongjie Song ,  Narayan Pottore ,  Nina Fonstein

IPC: C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C21D9/46 ,  C21D8/02 ,  C22C38/40 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: A cold rolled and annealed martensitic steel sheet is provided. The steel sheet includes by weight percent, 0.30≤C≤0.5%, 0.2≤Mn≤1.5%, 0.5≤Si≤3.0%, 0.02≤Ti≤0.05%, 0.001≤N≤0.008%, 0.0010≤B≤0.0030%, 0.01≤Nb≤0.1%, 0.2≤Cr≤2.0%, P≤0.02%, S≤0.005%, Al≤1%, Mo≤1% and Ni≤0.5%. The remainder of the composition includes iron and unavoidable impurities resulting from melting. The microstructure is 100% martensitic and a prior austenite grain size is lower than 20 μm. The steel sheet has a delayed fracture resistance of at least 24 hours during an acid immersion U-bend test. A method, part, structural member and vehicle are also provided.

公开(公告)号：US20220220596A1

公开(公告)日：2022-07-14

申请号：US17708568

申请日：2022-03-30

Applicant: ArcelorMittal

Inventor： Rongjie Song ,  Narayan S. Pottore

IPC: C22C38/14 ,  C22C38/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12

Abstract: A martensitic steel alloy is provided. The martensitic steel alloy includes carbon from 0.22 to 0.36 wt. %, manganese from 0.5% to 2.0% wt. %, and chromium in an amount less than 0.10 wt. %. and a carbon equivalent Ceq of less than 0.44 in which Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. Ceq is the carbon equivalent, C, Mn, Cr, Mo, V, Ni, and Cu are in wt. % of the elements in the alloy. The alloy has an ultimate tensile strength of at least 1700 MPa.

公开(公告)号：US20150267281A1

公开(公告)日：2015-09-24

申请号：US14361293

申请日：2012-11-28

Applicant: ARCELORMITTAL LNVESTIGACION Y DESARROLLO S.L.

Inventor： Rongjie Song ,  Narayan S. Pottore

IPC: C22C38/14 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/06

Abstract: Martensitic steel compositions and methods of production thereof. More specifically, the martensitic steels have tensile strengths ranging from 1700 to 2200 MPa. Most specifically, the invention relates to thin gage (thickness of ≦1 mm) ultra high strength steel with an ultimate tensile strength of 1700-2200 MPa and methods of production thereof.

Abstract translation: 马氏体钢组合物及其生产方法。 更具体地说，马氏体钢的拉伸强度为1700〜2200MPa。 最具体地说，本发明涉及极限拉伸强度为1700-2200MPa的薄规格（厚度为nlE; 1mm）的超高强度钢及其生产方法。