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公开(公告)号：US20220341010A1
公开(公告)日：2022-10-27
申请号：US17762627
申请日：2020-09-25
发明人： Chunsu LIU , Yulong ZHANG , Siliang ZHANG , Feng YANG , Yaping NI , Jintao WANG , Hanlong ZHANG , Ming WANG
摘要： Disclosed in the present invention is complex-phase steel having high hole expansibility. The complex-phase steel has a microstructure of ferrite and bainite. The complex-phase steel having high hole expansibility comprises the following chemical elements in percentage by mass: C: 0.06-0.09%, Si: 0.05-0.5%, Al: 0.02-0.1%, Mn: 1.5-1.8%, Cr: 0.3-0.6%, Nb≤0.03%, Ti: 0.05-0.12%, and the balance of Fe and inevitable impurities. In addition, also disclosed in the present invention is a manufacturing method for the foregoing complex-phase steel having high hole expansibility. The method comprises the following steps: (1) smelting and casting; (2) heating; (3) hot-rolling; (4) phosphorous removal; (5) laminar cooling: a relaxation time period is controlled to be 0-8 s, and a laminar cooling rate is 40-70° C./s; (6) coiling; (7) leveling; and (8) pickling. The complex-phase steel having high hole expansibility can simultaneously satisfy the requirements for hole expansibility and good plasticity.
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公开(公告)号：US20200157671A1
公开(公告)日：2020-05-21
申请号：US16616118
申请日：2018-04-20
发明人： Xinyan JIN , Yulong ZHANG , Guangkui HU
摘要： A hot dipped medium manganese steel and a manufacturing method therefor. The medium manganese steel comprises a steel base plate and a coating on the surface of the steel base plate; the mass percentages of the components in the hot dipped medium manganese steel are: C: 0.1 to 0.3%, Si: 0.1 to 2.0%, Mn: 5 to 12%, Al: 1 to 2%, P≤0.02%, S≤0.02%, N≤0.005%, and the remaining being Fe and unavoidable impurities; the core structure is ferrite and austenite, and the surface layer of the steel base plate is a ferrite layer.
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3.发明申请公开(公告)号：US20190271064A1
公开(公告)日：2019-09-05
申请号：US16320235
申请日：2017-07-25
发明人： Yulong ZHANG , Qihang HAN , Li WANG
IPC分类号： C22C38/38 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , C22C38/34 , C22C38/12 , C22C38/14 , C21D8/02
摘要： Provided are a 1500 MPa-grade steel with a high product of strength and elongation for vehicles and a manufacturing method thereof. The mass percentages of the chemical elements thereof are: 0.1-0.3% of C, 0.1-2.0% of Si, 7.5-12% of Mn, 0.01-2.0% of Al, and the balance of iron and other inevitable impurities. The microstructure of the steel with a high product of strength and elongation for vehicles is austenite+martensite+ferrite or austenite+martensite. The steel for vehicles can reach a grade of 1500 MPa, and has a product of strength and elongation of no less than 30 GPa %.
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4.发明公开公开(公告)号：US20230357882A1
公开(公告)日：2023-11-09
申请号：US18043034
申请日：2021-08-26
发明人： Hanlong ZHANG , Yulong ZHANG , Chunsu LIU , Xinyan JIN
IPC分类号： C21D9/52 , C22C38/38 , C22C38/32 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/20 , C22C38/58 , C22C38/50 , C22C38/44 , C22C38/54 , C22C38/24 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00 , C21D1/84 , C21D1/18
CPC分类号： C21D9/52 , C22C38/38 , C22C38/32 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/20 , C22C38/58 , C22C38/50 , C22C38/44 , C22C38/54 , C22C38/24 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/005 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D1/84 , C21D1/18 , C21D2211/002
摘要： GPa-grade bainite steel having an ultra-high yield ratio, containing, in addition to Fe, the following chemical elements in mass percentages: 0.12-0.24% of C; 0.2-0.5% of Si; 1.3-2.0% of Mn; 0.001-0.004% of B; 0.01-0.05% of Al; and at least one of Cr, Nb, Ti, and Mo, wherein Cr≤0.4%, Nb≤0.06%, Ti≤0.1%, and Mo≤0.4%. Also disclosed are a manufacturing method and annealing process for the steel.
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5.发明公开公开(公告)号：US20230295787A1
公开(公告)日：2023-09-21
申请号：US18017285
申请日：2021-07-30
发明人： Chunsu LIU , Yulong ZHANG , Feng YANG , Yaping NI , Ruodong LU , Jintao WANG , Jun HAN , Tongwen YU
IPC分类号： C22C38/38 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/06 , C22C38/02 , C21D8/02 , C22C38/00
CPC分类号： C22C38/38 , C21D8/0205 , C21D8/0226 , C21D8/0273 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/26 , C22C38/28 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009
摘要： Disclosed are a steel plate for a torsion beam and a manufacturing method therefor, and a torsion beam and a manufacturing method therefor. The steel plate for the torsion beam has the following chemical components in percentages by mass: 0.04-0.085% of C, 0.02-0.5% of Si, 1.3-1.8% of Mn, 0.15-0.5% of Cr, 0.12-0.30% of Mo, 0.058% or less of Nb, 0.15% or less of V, 0.02% or less of Ti, 0.02-0.1% of Al, 0.02% or less of P, 0.005% or less of S, 0.005% or less of N, and the balance being Fe and inevitable impurities. The steel plate has one or two of Nb and V, and the amount of Nb and V satisfies 0.096%
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公开(公告)号：US20210269891A1
公开(公告)日：2021-09-02
申请号：US17256080
申请日：2019-06-25
发明人： Hanlong ZHANG , Yulong ZHANG , Li WANG
IPC分类号： C21D9/46 , C21D8/02 , C21D6/00 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/06 , C22C38/02 , C22C38/00
摘要： An ultra-high-strength hot-rolled steel plate and steel strip having good fatigue and reaming properties and a manufacturing method therefor. The weight percentages of the components of the steel plate and the steel strip are: C: 0.07-0.14%, Si: 0.1-0.4%, Mn: 1.55-2.00%, P≤0.015%, S≤0.004%, Al: 0.01-0.05%, N≤0.005%, Cr: 0.15-0.50%, V: 0.1-0.35%, Nb: 0.01%-0.06%, Mo: 0.15-0.50%, Ti≤0.02%, and the balance of Fe and unavoidable impurities. Such components need to meet: 1.0≤[(Cr/52)/(C/4)+(Nb/93+Ti/48+V/51+Mo/96)/(C/12)]≤1.6. The tensile strength of the ultrahigh-strength hot-rolled steel plate and steel strip is ≥780 MPa, the yield strength thereof is ≥660 MPa, the tensile fatigue limit (10 million cycles) FL thereof is ≥570 MPa, or the fatigue limit to tensile strength FL/Rm thereof is ≥0.72. The reaming rate meets: if an original hole is a punched hole, the reaming rate thereof is >85%; and if the original hole is a reamed hole, the reaming rate thereof is >120%.
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公开(公告)号：US20230052592A1
公开(公告)日：2023-02-16
申请号：US17789089
申请日：2020-12-30
发明人： Hanlong ZHANG , Yiqiang SUN , Xinping MAO , Yulong ZHANG , Cheng WANG , Xinyan JIN , Li WANG , Shuize WANG
IPC分类号： C21D9/52 , C22C38/58 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/06 , C22C38/02 , C21D8/02
摘要： Disclosed are a low-cost ultra-high-strength multiphase steel plate/steel strip and its manufacturing method. Said steel plate/steel strip comprises the following components in percentage by weight: 0.03 to 0.07% of C, 0.1 to 0.5% of Si, 1.3 to 1.9% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.01 to 0.05% of Al, 0.2 to 0.5% of Cr, 0.07 to 0.14% of Ti, less than 0.03% of (Ni+Nb+Mo+V), and the balance being Fe and other inevitable impurities; and Mn+1.5Cr+5(Ti+Al+Cu)+10(Mo+Ni)+20(Nb+V)
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公开(公告)号：US20230049380A1
公开(公告)日：2023-02-16
申请号：US17789204
申请日：2020-12-30
发明人： Hanlong ZHANG , Yiqiang SUN , Xinping MAO , Cheng WANG , Yulong ZHANG , Xinyan JIN , Shuize WANG , Li WANG
IPC分类号： C21D9/52 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/06 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/02 , C21D6/00 , C23C2/02 , C23C2/06 , C23C2/40
摘要： Disclosed are a low-silicon and low-carbon equivalent GPa grade multi-phase steel plate/steel strip and a manufacturing method therefor. The steel plate/steel strip comprises the following components in percentages by weight: 0.03-0.07% of C, 0.1-0.5% of Si, 1.7-2.0% of Mn, P 0.001, the content of available B*=B-[Ti-3.4N-1.2(C—Nb/7.8)]/22, CE 980 MPa and a yield strength of >780 MPa, and the hole expansion rate satisfies: if an original hole is a punched hole, the hole expansion rate is >50%; and if the original hole is a reamed hole, the hole expansion rate is >60%. The steel plate is mainly used in the preparation of vehicle chassis and suspension system parts.
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