公开(公告)号：US20160222486A1

公开(公告)日：2016-08-04

申请号：US15097039

申请日：2016-04-12

Applicant: ArcelorMittal

Inventor： Antoine Moulin ,  Veronique Sardoy ,  Catherine Vinci ,  Gloria Restrepo Gacess ,  Tom Watershoot ,  Mohamed Goune

IPC: C21D9/46 ,  C23C2/06 ,  C23C2/36 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C21D1/84 ,  B22D7/00 ,  B22D11/00 ,  C23C2/02

CPC classification number: 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

Abstract: The present invention provides a cold-rolled and annealed Dual-Phase steel sheet having strength from 980 to 1100 MPa and a breaking elongation greater than 9%. The composition includes the contents being expressed by weight: 0.055%≦C≦0.095%, 2%≦Mn≦2.6%, 0.005%≦Si≦0.35%, S≦0.005%, P≦0.050%, 0.1≦Al≦0.3%, 0.05%≦Mo≦0.25%, 0.2%≦Cr≦0.5%, Cr+2Mo≦0.6%, Ni≦0.1%, 0.010≦Nb≦0.040%, 0.010≦Ti≦0.050%, 0.0005≦B≦0.0025%, and 0.002%≦N≦0.007%. The remainder of the composition includes iron and inevitable impurities resulting from the smelting. A manufacturing method is also provided.

Abstract translation: 本发明提供一种强度为980〜1100MPa，断裂伸长率大于9％的冷轧退火双相钢板。 该组合物包含以重量计：0.055％≤C≤0.095％，2％≤Mn≤2.6％，0.005％≤Si≤0.35％，S≤0.005％，P≤0.050％，0.1≤Al≤0.3％ ，0.05％≤Mo≤0.25％，0.2％≤Cr≤0.5％，Cr +2Mo≤0.6％，Ni≤0.1％，0.010≤Nb≤0.040％，0.010≤Ti≤0.050％，0.0005≤B≤0.0025％ 0.002％≤N≤0.007％。 组合物的其余部分包括由冶炼产生的铁和不可避免的杂质。 还提供了一种制造方法。

公开(公告)号：US20220136078A1

公开(公告)日：2022-05-05

申请号：US17575300

申请日：2022-01-13

Applicant: ArcelorMittal

Inventor： Javier Gil Otin ,  Antoine Moulin

IPC: C21D9/46 ,  C22C38/06 ,  C22C38/22 ,  C22C38/32 ,  C22C38/00 ,  C22C38/38 ,  C21D8/02 ,  C22C38/12 ,  C23G1/08 ,  C21D9/52 ,  C22C38/02 ,  C22C38/14 ,  C22C38/28 ,  B22D11/00 ,  C22C38/04 ,  C23G1/00

Abstract: The present invention provides a cold-rolled and annealed steel sheet with a strength greater than 1200 MPa, the composition of which includes, the contents being expressed by weight: 0.10%≤C≤0.255, 1%≤Mn≤3%, A≥0.010%, Si≤2.990%, S≤0.015%, P≤0.1% s, N≤0.008%, it being understood that 1%≤Si+Al≤3%, it being understood that Cr+3Mo≥0.3%, Ti in an amount such that Ti/N≥4 and Ti≤0.040%. A balance of the composition includes iron and inevitable impurities resulting from the smelting. The microstructure of the steel includes 15 to 90% bainite, the remainder includes martensite and residual austenite.

公开(公告)号：US20200032366A1

公开(公告)日：2020-01-30

申请号：US16592341

申请日：2019-10-03

Applicant: ArcelorMittal

Inventor： Javier Gil Otin ,  Antoine Moulin

IPC: C21D9/46 ,  C21D8/02 ,  C21D9/52 ,  C23G1/08 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  B22D11/00 ,  C22C38/00 ,  C22C38/14 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23G1/00

Abstract: A process for manufacturing a cold-rolled steel sheet with a strength of at least 1200 MPa and an elongation at break greater than 10%. A steel is provided having a microstructure comprising 65 to 90% bainite. A semifinished product is cast from the steel and heated to a temperature greater than 1150° C. The semifinished product is hot rolled to obtain a hot-rolled sheet; the coiled and pickled. Cold-rolling occurs with a reduction ratio of between 30 and 80% so as to obtain a cold-rolled sheet; and then reheating occurs at a rate Vc between 5 and 15° C./s up to a temperature T1 between Ac3 and Ac3+20° C. and held at said temperature T1 for a time t1 between 50 and 150 s. The sheet is cooled at a rate VR1 greater than 40° C./s but below 100° C./s down to a temperature T2 between (Ms−30° C. and Ms+30° C.). The sheet is maintained at temperature T2 for a time t2 between 150 and 350 s, and then cooled at a rate VR2 of less than 30° C./s down to an ambient temperature.

公开(公告)号：US10190187B2

公开(公告)日：2019-01-29

申请号：US15097039

申请日：2016-04-12

Applicant: ArcelorMittal

Inventor： Antoine Moulin ,  Veronique Sardoy ,  Catherine Vinci ,  Gloria Restrepo Gacess ,  Tom Watershoot ,  Mohamed Goune

IPC: C21D9/46 ,  C21D8/02 ,  C23C2/06 ,  C23C2/28 ,  C22C38/04 ,  C23C2/02 ,  B22D7/00 ,  B22D11/00 ,  C21D1/84 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/36

Abstract: The present invention provides a cold-rolled and annealed Dual-Phase steel sheet having strength from 980 to 1100 MPa and a breaking elongation greater than 9%. The composition includes the contents being expressed by weight: 0.055%≤C≤0.095%, 2%≤Mn≤2.6%, 0.005%≤Si≤0.35%, S≤0.005%, P≤0.050%, 0.1≤Al≤0.3%, 0.05%≤Mo≤0.25%, 0.2%≤Cr≤0.5%, Cr+2Mo≤0.6%, Ni≤0.1%, 0.010≤Nb≤0.040%, 0.010≤Ti≤0.050%, 0.0005≤B≤0.0025%, and 0.002%≤N≤0.007%. The remainder of the composition includes iron and inevitable impurities resulting from the smelting. A manufacturing method is also provided.

公开(公告)号：US11414722B2

公开(公告)日：2022-08-16

申请号：US16592341

申请日：2019-10-03

Applicant: ArcelorMittal

Inventor： Javier Gil Otin ,  Antoine Moulin

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D9/52 ,  C23G1/08 ,  B22D11/00 ,  C22C38/00 ,  C22C38/14 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23G1/00

Abstract: A process for manufacturing a cold-rolled steel sheet with a strength of at least 1200 MPa and an elongation at break greater than 10%. A steel is provided having a microstructure comprising 65 to 90% bainite. A semifinished product is cast from the steel and heated to a temperature greater than 1150° C. The semifinished product is hot rolled to obtain a hot-rolled sheet; the coiled and pickled. Cold-rolling occurs with a reduction ratio of between 30 and 80% so as to obtain a cold-rolled sheet; and then reheating occurs at a rate Vc between 5 and 15° C./s up to a temperature T1 between Ac3 and Ac3+20° C. and held at said temperature T1 for a time t1 between 50 and 150 s. The sheet is cooled at a rate VR1 greater than 40° C./s but below 100° C./s down to a temperature T2 between (Ms−30° C. and Ms+30° C.). The sheet is maintained at temperature T2 for a time t2 between 150 and 350 s, and then cooled at a rate VR2 of less than 30° C./s down to an ambient temperature.

公开(公告)号：US20190106765A1

公开(公告)日：2019-04-11

申请号：US16213455

申请日：2018-12-07

Applicant: ArcelorMittal

Inventor： Antoine Moulin ,  Veronique Sardoy ,  Catherine Vinci ,  Gloria Restrepo Gacess ,  Tom Watershoot ,  Mohamed Goune

IPC: C21D9/46 ,  C22C38/54 ,  C21D8/02 ,  B22D7/00 ,  B22D11/00 ,  C21D1/84 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C23C2/36 ,  C22C38/58 ,  C23C2/28 ,  C23C2/02 ,  C22C38/04 ,  C23C2/06

Abstract: The present invention provides a cold-rolled and annealed Dual-Phase steel sheet having a tensile strength from 980 to 1100 MPa. The composition includes the contents being expressed by weight: 0.055%≤C≤0.095%, 2%≤Mn≤2.6%, 0.005%≤Si≤0.35%, S≤0.005%, P≤0.050%, 0.1≤Al≤0.3%, 0.05%≤Mo≤0.25%, 0.2%≤Cr≤0.5%, Cr+2 Mo≤0.6%, Ni≤0.1%, 0.010≤Nb≤0.040%, 0.010≤Ti≤0.050%, 0.0005≤B≤0.0025%, and 0.002%≤N≤0.007%. The remainder of the composition includes iron and inevitable impurities resulting from the smelting. A microstructure of the steel sheet is 40 to 65% ferrite, 35 to 50% martensite and 0 to 10% bainite. A non-recrystallized ferrite fraction is less than or equal to 15%.

公开(公告)号：US20160355900A1

公开(公告)日：2016-12-08

申请号：US15243610

申请日：2016-08-22

Applicant: ArcelorMittal

Inventor： Javier Gil Otin ,  Antoine Moulin

IPC: C21D9/46 ,  C22C38/32 ,  C22C38/28 ,  C22C38/22 ,  C22C38/14 ,  B22D11/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C23G1/00 ,  C22C38/38 ,  C22C38/12

CPC classification number: C21D9/46 ,  B22D11/001 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/52 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23G1/00 ,  C23G1/08

Abstract: The present invention provides a cold-rolled and annealed steel sheet with a strength greater than 1200 MPa, the composition of which includes, the contents being expressed by weight: 0.10%≦C≦0.25%, 1%≦Mn≦3%, A≧0.010%, Si≦2.990%, S≦0.015%, P≦0.1%, N≦0.008%, it being understood that 1%≦Si+Al≦3%, it being understood that Cr+3Mo≧0.3%, Ti in an amount such that Ti/N≧4 and Ti≦0.040%. A balance of the composition includes iron and inevitable impurities resulting from the smelting. The microstructure of the steel includes 15 to 90% bainite, the remainder includes martensite and residual austenite.

Abstract translation: 本发明提供一种强度大于1200MPa的冷轧退火钢板，其组成包括：重量含量：0.10％≤C≤0.25％，1％≤Mn≤3％，A ≧0.010％，Si≤2.990％，S≤0.015％，P≤0.1％，N≤0.008％，1％≤Si+Al≤3％，可知Cr +3Mo≥0.3％，Ti 其量使得Ti /N≥4和Ti≤0.040％。 组合物的余量包括由冶炼产生的铁和不可避免的杂质。 钢的显微组织包括15％至90％的贝氏体，其余包括马氏体和残余奥氏体。