公开(公告)号：US11414721B2

公开(公告)日：2022-08-16

申请号：US16302982

申请日：2017-05-18

Applicant: ARCELORMITTAL

Inventor： Nicolas Charbonnier ,  Gerard Petitgand ,  Sebastien Allain ,  Marie-Christine Theyssier

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C23C2/06 ,  C22C38/02 ,  C22C38/06 ,  C23C2/02 ,  C23C2/40 ,  C22C38/12 ,  C22C38/16 ,  C23C2/12 ,  C22C38/04 ,  C22C38/00 ,  C21D8/04 ,  B32B15/01 ,  C22C38/20 ,  C22C38/24 ,  C22C38/38 ,  C23F17/00

Abstract: A method for the manufacture of a TWIP steel is provided including: (A) feeding of a slab comprising by weight: 0.5

公开(公告)号：US20180010220A1

公开(公告)日：2018-01-11

申请号：US15711335

申请日：2017-09-21

Applicant: ARCELORMITTAL

Inventor： Sebastien Allain ,  Audrey Couturier ,  Thierry Iung ,  Christine Colin

IPC: C22C38/02 ,  C22C38/34 ,  C22C38/22 ,  C22C38/12 ,  C21D9/32 ,  C21D1/19 ,  C22C38/04 ,  C21D8/02 ,  C21D9/46 ,  C22C38/38 ,  C22C38/06

CPC classification number: C22C38/02 ,  C21D1/19 ,  C21D8/02 ,  C21D9/32 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38

Abstract: The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr +(3×Mo)≦0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%.

公开(公告)号：US20160160309A1

公开(公告)日：2016-06-09

申请号：US14907358

申请日：2014-07-24

Applicant: ARCELORMITTAL SA

Inventor： Sebastien Allain ,  Jean-Christophe Hell

IPC: C21D9/46 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C21D1/26 ,  C23C2/06 ,  C23C2/40 ,  B22D7/00 ,  C22C38/58

CPC classification number: C21D9/46 ,  B22D7/00 ,  B32B15/013 ,  C21D1/26 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

Abstract: The invention relates to the manufacture of a cold-rolled steel sheet having a strength of more than 900 MPa, an elastic limit of more than 700 MPa and distributed elongation of more than 12%, the composition of which includes, the contents being expressed as weight percentages: 0.26%≦C≦0.45%, 1.0%≦Mn≦3.0%, 1.0%≦Si≦3.0%, Al≦0.10%, 0%≦Cr≦1.5% %, S≦0.005%, P≦0.020%, Nb≦0.1%, Ti≦0.020%, V≦0.015%, N≦0.01%, the remainder of the composition being iron and inevitable impurities resulting from the production process. The microstructure, given in surface proportions, comprises 13% to 25% residual austenite and 13% to 30% MA islands, the remainder consisting of bainite and possibly ferrite.

Abstract translation: 本发明涉及制造强度超过900MPa，弹性极限超过700MPa，分布伸长率大于12％的冷轧钢板，其组成包括内容物表示为 重量百分比：0.26％＆lt; NlE; C＆nlE; 0.45％，1.0％＆nlE; Mn＆nlE; 3.0％，1.0％＆nlE; Si＆amp; NEE; 3.0％Al和nIE; 0.10％，0％ P <0.01; 0.020％，Nb＆nlE; 0.1％，Ti＆NlE; 0.020％，V＆NlE; 0.015％，N＆lt; l1; 0.01％，组成的剩余部分为铁和生产过程产生的不可避免的杂质。 以表面比例给出的微结构包含13％至25％的残余奥氏体和13％至30％的MA岛，其余部分由贝氏体和可能的铁素体组成。

公开(公告)号：US10308995B2

公开(公告)日：2019-06-04

申请号：US14907358

申请日：2014-07-24

Applicant: ArcelorMittal

Inventor： Sebastien Allain ,  Jean-Christophe Hell

IPC: C22C38/04 ,  C22C38/02 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/34 ,  C22C38/38 ,  C21D9/46 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  B22D7/00 ,  C21D1/26 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  B32B15/01

Abstract: The invention relates to the manufacture of a cold-rolled steel sheet having a strength of more than 900 MPa, an elastic limit of more than 700 MPa and distributed elongation of more than 12%, the composition of which includes, the contents being expressed as weight percentages: 0.26%≤C≤0.45%, 1.0%≤Mn≤3.0%, 1.0%≤Si≤3.0%, Al≤0.10%, 0%≤Cr≤1.5%, S≤0.005%, P≤0.020%, Nb≤0.1%, Ti≤0.020%, V≤0.015%, N≤0.01%, the remainder of the composition being iron and inevitable impurities resulting from the production process. The microstructure, given in surface proportions, comprises 13% to 25% residual austenite and 13% to 30% MA islands, the remainder consisting of bainite and possibly ferrite.

公开(公告)号：US10370746B2

公开(公告)日：2019-08-06

申请号：US15711335

申请日：2017-09-21

Applicant: ARCELORMITTAL

Inventor： Sebastien Allain ,  Audrey Couturier ,  Thierry Iung ,  Christine Colin

IPC: C21D1/19 ,  C22C38/02 ,  C21D8/02 ,  C21D9/32 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38

Abstract: The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≤C≤0.25%; 1%≤Mn≤3%; Al≥0.015%; Si≤1.985%; Mo≤0.30%; Cr≤1.5%; S≤0.015%; P≤0.1%; Co≤1.5%; B≤0.005%; it being understood that 1%≤Si+Al≤2%; Cr+(3×Mo)≥0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%.

公开(公告)号：US20140170439A1

公开(公告)日：2014-06-19

申请号：US14116734

申请日：2012-05-03

Applicant: ARCELORMITTAL INVESTIGACION Y DESAROLLO SL

Inventor： Sebastien Allain ,  Jan Mahieu ,  Mickael Denis Crouvizier ,  Thierry Mastrorillo ,  Arnaud Hennion

IPC: B32B15/01 ,  C22C38/58 ,  C22C38/42 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/34

CPC classification number: B32B15/013 ,  C21D1/20 ,  C21D8/0247 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/58 ,  Y10T428/12799

Abstract: The present invention provides a cold rolled steel sheet. The steel sheet has a strength greater than 1000 MPa, a uniform elongation greater than 12% and a V-bendability greater than 90°. The composition of the steel sheet includes, expressed in per cent by weight, 0.15%≦C≦0.25%, 1.8%≦Mn≦3.0%, 1.2%≦Si≦2%, 0%≦Al≦0.10%, 0%≦Cr≦0.50%, 0%≦Cu≦1%, 0%≦Ni≦1%, 0%≦S≦0.005%, 0%≦P≦0.020%, Nb≦0.015%, Ti≦0.020%, V≦0.015%, Co≦1%, N≦0.008%, B≦0.001% whereby Mn+Ni+Cu≦3%. The remainder of the composition consists of iron and inevitable impurities resulting from processing. The microstructure includes, in area percentage, 5 to 20% polygonal ferrite, 10 to 15% residual austenite, 5 to 15% martensite and a balance of bainite. The bainite is in the form of laths and includes carbides between the laths. A number N of inter-lath carbides larger than 0.1 micrometers per unit of surface area is less than or equal to 50000/mm2. A fabrication method and a motor vehicle are also provided.

Abstract translation: 本发明提供一种冷轧钢板。 钢板的强度大于1000MPa，均匀伸长率大于12％，V形弯曲度大于90°。 钢板的组成包括：以重量百分比计，0.15％＆lt; NlE; C＆NlE; 0.25％，1.8％＆nlE; Mn＆amp; NlE; 3.0％，1.2％＆amp; NlE; Si＆NlE; 2％，0％＆amp; ，0％＆nlE; Cr＆nlE; 0.50％，0％和nlE; Cu和nlE; 1％，0％和nlE; Ni和nlE; 1％，0％ ，TiNl; 0.020％，V＆NlE; 0.015％，Co＆NlE; 1％，N＆amp; NlE; 0.008％，B＆NlE; 0.001％，由此Mn + Ni + Cu＆NlE; 3％。 组合物的其余部分由加工产生的铁和不可避免的杂质组成。 微观结构包括面积百分比为5至20％的多边形铁素体，10至15％的残余奥氏体，5至15％的马氏体和贝氏体的平衡。 贝氏体是板条的形式，包括板条之间的碳化物。 每单位表面积大于0.1微米的层间碳化物数量N小于或等于50000 / mm2。 还提供了制造方法和机动车辆。