公开(公告)号：US11268163B2

公开(公告)日：2022-03-08

申请号：US16311376

申请日：2017-06-19

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Huanrong Wang ,  Ana Yang ,  Jiansu Zhang ,  Wei Wang

IPC: C21D9/46 ,  C22C38/06 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

Abstract: A 980 MPa-grade hot-rolled dual-phase steel and a manufacturing method therefor. The chemical components of the steel comprise, in percentage by weight, 0.10%-0.20% of C, 0.8%-2.0% of Si, 1.0%-2.0% of Mn, 0-0.02% of P, 0-0.005% of S, 0-0.003% of O, 0.02%-0.06% of Al, 0-0.006% of N, 0.01%-0.06% of Nb, 0.01%-0.05% of Ti, and the balance of Fe and inevitable impurities. In addition, the components need to meet the following relation: 0.05%≤Nb+Ti≤0.10. The microstructure of the steel is made of ferrite and martensite. The average grain size of the ferrite is 5-10 μm, and the equivalent grain size of the martensite is 15-20 μm. The yield strength of the steel is greater than or equal to 500 MPa, the tensile strength of the steel is greater than or equal to 980 MPa, and the ductility A80 is greater than or equal to 12%; the steel has excellent strength, ductility and tenacity matching and a relatively low yield ratio, and can be applied to parts requiring good formability, high strength and reduced thickness, such as wheels.

公开(公告)号：US20170349987A1

公开(公告)日：2017-12-07

申请号：US15536200

申请日：2015-12-08

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Gang Liu ,  Ana Yang ,  Zigang Li ,  Fengming Song

IPC: C22C38/54 ,  C22C38/48 ,  C22C38/46 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C22C38/02 ,  C22C38/00 ,  C22C38/50 ,  C22C38/44

CPC classification number: C22C38/54 ,  C21D1/02 ,  C21D1/18 ,  C21D1/22 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/13 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

Abstract: A high-strength steel having a yield strength at a level of 800 MPa and a method of manufacturing the same, with the components and amounts thereof by weight percentage being: C:0.06-0.14%, Si: 0.1-0.30%, Mn: 0.8-1.60%, Cr: 0.2-0.70%, Mo: 0.1-0.40%, Ni: 0-0.30%, Nb: 0.01-0.030%, Ti: 0.01-0.030%, V: 0.01-0.05%, B: 0.0005-0.0030%, Al: 0.02-0.06%, Ca: 0.001-0.004%, N: 0.002-0.005%, P≦0.02%, S≦0.01%, O≦0.008%, the balance of Fe and unavoidable impurities; wherein the above elements meet the following relationships: 0.40%

公开(公告)号：US10961611B2

公开(公告)日：2021-03-30

申请号：US15536200

申请日：2015-12-08

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Gang Liu ,  Ana Yang ,  Zigang Li ,  Fengming Song

IPC: C22C38/54 ,  C22C38/48 ,  C22C38/46 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C22C38/02 ,  C22C38/00 ,  C22C38/50 ,  C22C38/44 ,  C22C38/58 ,  C21D1/22 ,  C21D6/00 ,  C22C38/32 ,  C21D1/02 ,  C21D1/18 ,  C21D7/13 ,  C22C38/40 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/24 ,  C21D9/46

Abstract: A high-strength steel having a yield strength at a level of 800 MPa and a method of manufacturing the same, with the components and amounts thereof by weight percentage being: C: 0.06-0.14%, Si: 0.1-0.30%, Mn: 0.8-1.60%, Cr: 0.2-0.70%, Mo: 0.1-0.40%, Ni: 0-0.30%, Nb: 0.01-0.030%, Ti: 0.01-0.030%, V: 0.01-0.05%, B: 0.0005-0.0030%, Al: 0.02-0.06%, Ca: 0.001-0.004%, N: 0.002-0.005%, P≤0.02%, S≤0.01%, O≤0.008%, the balance of Fe and unavoidable impurities; wherein the above elements meet the following relationships: 0.40%

公开(公告)号：US20170349966A1

公开(公告)日：2017-12-07

申请号：US15536601

申请日：2015-12-08

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Ana Yang ,  Gang Liu ,  Wei Wang ,  Xiaozhen Yang

IPC: C21D9/46 ,  C21D1/18 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C21D6/00 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/54 ,  C21D8/02 ,  C22C38/58 ,  C22C38/44

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0247 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

Abstract: A quenched-tempered high-strength steel having a yield strength of 900-1000 MPa grade and a method of producing the same, with the components and amounts thereof by weight percentage being: C: 0.16-0.20%, Si: 0.10-0.30%, Mn: 0.80-1.60%, Cr: 0.20-0.70%, Mo: 0.10-0.45%, Ni: 0.10-0.50%, Nb: 0.010-0.030%, Ti: 0.010-0.030%, V: 0.010-0.050%, B: 0.0005-0.0030%, Al: 0.02-0.06%, Ca: 0.001-0.004%, N: 0.002-0.005%, P≦0.020%, S≦0.010%, O≦0.008%, and the balance of Fe and unavoidable impurities, and Ceq 0.51-0.60%, Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15; 3.7≦Ti/N≦7.0; 1.0≦Ca/S≦3.0; 0.8%≦Mo+0.8Ni+0.4Cr+6V≦1.3%. By using a process of controlling rolling, controlling cooling, and off-line quenching+tempering, a steel sheet produced according to the disclosure has a yield strength of 900-1080 MPa, a tensile strength of 950-1200 MPa, an elongation >10%, and an impact energy at −40° C. >40 J.

公开(公告)号：US11319607B2

公开(公告)日：2022-05-03

申请号：US15536743

申请日：2015-11-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Huanrong Wang ,  Ana Yang ,  Wei Wang

IPC: C21D8/02 ,  C21D1/20 ,  C22C38/12 ,  C22C38/00 ,  C22C38/38 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

Abstract: Disclosed are a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength and a method for manufacturing the same, the chemical composition of the steel plate in weight percentage being: C: 0.15-0.25%, Si: 1.0-2.0%, Mn: 1.2-2.0%, P≤0.015%, S≤0.005%, Al: 0.5-1.0%, N: ≤0.006%, Nb: 0.02-0.06%, O≤0.003%, and the balance being Fe and other inevitable impurities, and 1.5%≤Si+Al≤2.5%. By adopting an isothermal heat treatment a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength, which has a microstructure mainly including bainite ferrite and residual austenite, is obtained impact energy.

公开(公告)号：US11220724B2

公开(公告)日：2022-01-11

申请号：US16311480

申请日：2017-06-19

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Huanrong Wang ,  Ana Yang ,  Jiansu Zhang ,  Wei Wang

IPC: C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/02 ,  C21D6/00 ,  C22C38/00

Abstract: A 980 MPa-grade hot-rolled ferrite bainite dual-phase steel and a manufacturing method therefor. The chemical components of the steel comprise, in percentage by weight, 0.15-0.30% of C, 0.8-2.0% of Si, 1.0-2.0% of Mn, 0-0.02% of P, 0-0.005% of S, 0-0.003% of O, 0.5-1.0% of Al, 0-0.006% of N, 0.01-0.06% of Nb, 0.01-0.05% of Ti, and the balance of Fe and inevitable impurities. In addition, the chemical components meet the following relations: 0.05%≤Nb+Ti≤0.10%, and 2.5≤Al/C≤5.0. The microstructure of the steel is made of ferrite and bainite. The average grain size of the ferrite is 5-10 μm, and the equivalent grain size of the bainite is less than or equal to 20 μm. The yield strength of the steel is greater than or equal to 600 MPa, the tensile strength of the steel is greater than or equal to 980 Mpa, and the ductility is greater than or equal to 15%.

公开(公告)号：US20170349960A1

公开(公告)日：2017-12-07

申请号：US15536743

申请日：2015-11-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Huanrong Wang ,  Ana Yang ,  Wei Wang

IPC: C21D8/02 ,  C22C38/06 ,  C22C38/02 ,  C21D1/20 ,  C22C38/00 ,  C22C38/12 ,  C22C38/04

CPC classification number: C21D8/0263 ,  C21D1/20 ,  C21D8/02 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/38

Abstract: Disclosed are a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength and a method for manufacturing the same, the chemical composition of the steel plate in weight percentage being: C: 0.15-0.25%, Si: 1.0-2.0%, Mn: 1.2-2.0%, P≦0.015%, S≦0.005%, Al: 0.5-1.0%, N: ≦0.006%, Nb: 0.02-0.06%, O≦0.003%, and the balance being Fe and other inevitable impurities, and 1.5%≦Si+Al≦2.5%. By adopting an isothermal heat treatment a high-strength and high-toughness steel plate with an 800 MPa grade tensile strength, which has a microstructure mainly including bainite ferrite and residual austenite, is obtained impact energy.

公开(公告)号：US20150354041A1

公开(公告)日：2015-12-10

申请号：US14762592

申请日：2013-12-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Fengming Song ,  Donghui Wen ,  Zigang Li ,  Xiaoping Hu ,  Ana Yang ,  Jianye Li

IPC: C22C38/58 ,  C21D9/46 ,  C21D6/00 ,  C22C38/50 ,  C22C38/48 ,  B22D11/00 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C22C38/46

CPC classification number: C22C33/04 ,  B22D11/00 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/021 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

Abstract: The invention provides a highly corrosion-resistant, high strength, Al-containing weathering steel plate, wherein the chemical composition comprises in weight percentages (wt %) of: C: 0.02-0.07%, Si: 0.2-1.0%, Mn: 0.2-2.2%, P≦0.01%, S≦0.006%, Cu: 0.2-0.5%, Cr: 0.5-3.5%, Ni: 0.2-1.2%, Al: 0.4-4.0%, N≦0.005%; selectively added one or more of Nb: 0.01-0.06%, Ti: 0.01-0.10%, V: 0.02-0.10%; the balance of Fe and unavoidable impurities, wherein Al/Cr is 0.5-8.0. The steel plate has a yield strength of 350-500 MPa, an elongation of 20% or more, a relative corrosion rate of 27% or less and a good impact toughness and a low yield ratio. The present application also provides a method for manufacturing the weathering steel plate.

Abstract translation: 本发明提供了一种高耐腐蚀，高强度，含Al的耐候钢板，其中化学成分的重量百分比（重量％）包括：C：0.02-0.07％，Si：0.2-1.0％，Mn：0.2 -2.2％，P＆NlE; 0.01％，S＆NlE; 0.006％，Cu：0.2-0.5％，Cr：0.5-3.5％，Ni：0.2-1.2％，Al：0.4-4.0％，N＆ 选择性地添加Nb：0.01-0.06％，Ti：0.01-0.10％，V：0.02-0.10％中的一种或多种; 余量为Fe和不可避免的杂质，其中Al / Cr为0.5-8.0。 钢板的屈服强度为350〜500MPa，伸长率为20％以上，相对腐蚀率为27％以下，冲击韧性好，屈服比低。 本申请还提供了一种用于制造耐候钢板的方法。

公开(公告)号：US11180822B2

公开(公告)日：2021-11-23

申请号：US15536787

申请日：2015-11-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Huanrong Wang ,  Ana Yang ,  Wei Wang

IPC: C21D9/46 ,  C22C38/12 ,  C22C38/14 ,  B22D7/00 ,  C21C7/10 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

Abstract: Disclosed is provided a low yield ratio and superhigh-strength hot-rolled Q&P steel and a method for manufacturing the same, having the following chemical composition in weight percentage: C: 0.2-0.3%, Si: 1.0-2.0%, Mn: 1.5-2.5%, P: ≤0.015%, S: ≤0.005%, Al: 0.5-1.0%, N: ≤0.006%, Nb: 0.02-0.06%, Ti: ≤0.03%, O: ≤0.003%, and the balance being Fe and inevitable impurities. The manufacture method comprises a stepped cooling process to finally obtain the steel with a three-phase structure containing a certain volume fraction of proeutectoid ferrite; martensite; and residual austenite, and having an excellent comprehensive performance with a yield strength of ≥600 MPa, a tensile strength of ≥1300 MPa, a good elongation, and a low yield ratio. The obtained Q&P steel also shows an excellent match of high plasticity suitable for easy deformabilities and wear-resistances.

公开(公告)号：US10760149B2

公开(公告)日：2020-09-01

申请号：US14762592

申请日：2013-12-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Fengming Song ,  Donghui Wen ,  Zigang Li ,  Xiaoping Hu ,  Ana Yang ,  Jianye Li

IPC: C22C33/04 ,  C21D8/02 ,  C21D6/00 ,  B22D11/00 ,  C22C38/42 ,  C22C38/58 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C21D9/46

Abstract: The invention provides a highly corrosion-resistant, high strength, Al-containing weathering steel plate, wherein the chemical composition comprises in weight percentages (wt %) of: C: 0.02-0.07%, Si: 0.2-1.0%, Mn: 0.2-2.2%, P≤0.01%, S≤0.006%, Cu: 0.2-0.5%, Cr: 0.5-3.5%, Ni: 0.2-1.2%, Al: 0.4-4.0%, N≤0.005%; selectively added one or more of Nb: 0.01-0.06%, Ti: 0.01-0.10%, V: 0.02-0.10%; the balance of Fe and unavoidable impurities, wherein Al/Cr is 0.5-8.0. The steel plate has a yield strength of 350-500 MPa, an elongation of 20% or more, a relative corrosion rate of 27% or less and a good impact toughness and a low yield ratio. The present application also provides a method for manufacturing the weathering steel plate.