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公开(公告)号：US20180363093A1
公开(公告)日：2018-12-20
申请号：US16061189
申请日：2016-12-14
发明人： Xiaoting ZHAO , Bo YAN , Liandeng YAO , Sihai JIAO , Hongbin LI
IPC分类号： C21D9/50 , B32B15/01 , C21D8/02 , C21D6/00 , C22C38/54 , C22C38/50 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , B21B1/38
摘要： A dual-hardness clad steel plate. One surface of the steel plate is a high-hardness layer, the other surface of the steel plate is a low-hardness layer, and a combination of atoms is achieved between the high-hardness layer and the low-hardness layer by rolling bonding, wherein Mn13 steel is adopted for the low-hardness layer, and the Brinell hardness of the high-hardness layer is greater than 600. Further disclosed is a production method of the dual-hardness clad steel plate, comprising: 1) respectively preparing a high-hardness layer slab and a low-hardness layer slab; 2) assembling: preprocessing combined faces of the slabs, carrying out peripheral welded sealing on joint faces of the slabs, and carrying out vacuumizing treatment on a composite slab after welded sealing; 3) heating; 4) carrying out composite rolling; 5) cooling; and 6) carrying out thermal treatment, wherein the heating temperature is 1050-1100° C., the heating time is 2-3 min/mm×slab thickness, and water cooling is performed on the heated slab, and the water temperature is lower than 40° C. The steel plate has different hardness characteristics and good low-temperature toughness
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公开(公告)号：US10096415B2
公开(公告)日：2018-10-09
申请号：US15488585
申请日：2017-04-17
发明人： Aihua Ma , Bo Wang , Xiandong Liu , Liang Zou , Shishu Xie , Hongxu Hei
IPC分类号： H01F1/147 , C21D8/12 , C22C38/00 , C21D9/46 , H01F1/16 , B21B1/00 , C21D6/00 , C22C38/04 , C22C38/02 , C22C38/60 , C22C38/06
摘要： Disclosed are a non-oriented electrical steel plate with low iron loss and high magnetic conductivity and a manufacturing process therefor. The casting blank of the steel plate comprises the following components: Si: 0.1-2.0 wt %, Al: 0.1-1.0 wt %, Mn: 0.10-1.0 wt %, C: ≤0.005 wt %, P: ≤0.2 wt %, S: ≤0.005 wt %, N: ≤0.005 wt %, the balance being Fe and unavoidable impurities. The magnetic conductivity of the steel plate meets the following relationship formula: μ10+μ13+μ15≥13982−586.5P15/50; μ10+μ13+μ15≥10000, wherein P15/50 is the iron loss at a magnetic induction intensity of 1.5 T at 50 Hz; μ10, μ13, and μ15 is are relative magnetic conductivities at induction intensities of 1.0 T, 1.3 T, and 1.5 T at 50 Hz, respectively. The steel plate can be used for manufacturing highly effective and ultra-highly effective electric motors.
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公开(公告)号：US10092948B2
公开(公告)日：2018-10-09
申请号：US14386763
申请日：2013-03-20
发明人： Chen Zhang , Dexiang Cai , Jianguo Shen , Feng Mei
IPC分类号： B22D11/11 , B22D11/103
摘要： The invention provides a fluoride-free continuous casting mold flux for low-carbon steel, comprising, based on weight, Na2O 5-10%, MgO 3-10%, MnO 3-10%, B2O3 3-10%, Al2O3≤6%, Li2O
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54.发明授权公开(公告)号：US10000836B2
公开(公告)日：2018-06-19
申请号：US14773996
申请日：2014-03-13
发明人： Gaofei Liang , Yongjie Zhang , Qi Yang , Gang Wang
CPC分类号： C22F1/06 , B22D21/007 , B22D23/00 , C22C23/00 , C22C23/04
摘要： The present invention discloses a Mg—Ca—Zn—Zr magnesium alloy sheet, having the chemical compositions in weight percentage: Ca: 0.5˜1.0%, Zn: 0.4˜1.0%, Zr: 0.5˜1.0%, the remainders being Mg and unavoidable impurities; wherein the magnesium alloy sheet has an average grain size of less than or equal to 10 μm, an interarea texture strength of less than or equal to 5, an interarea texture strength after annealing at 250˜400° C. of less than or equal to 3, and a limiting drawing ratio at room temperature of more than AZ31; and the grain size thereof is remarkably less than that of AZ31B sheet produced in the same conditions, and the sheet texture is notably weakened. The magnesium alloy of the present invention has simple chemical compositions without noble alloy elements therein, thereby having a wide applicability and a low manufacturing cost, which can act as the sheets of interior door panels of cars, inner panels of engine lids, inner panels of trunk lids, internal decorative panels, vehicle bodies in the rail transits, and housings of 3C products, or the like.
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公开(公告)号：US20180073116A1
公开(公告)日：2018-03-15
申请号：US15559049
申请日：2015-12-08
发明人： Sixin Zhao , Liandeng Yao , Xiaobo Wang , Xiaoting Zhao
IPC分类号： C22C38/58 , C22C38/50 , C22C38/48 , C22C38/44 , C22C38/06 , C22C38/02 , C22C38/00 , C21D8/02 , C21D9/46
CPC分类号： C22C38/58 , C21D1/18 , C21D8/02 , C21D8/0226 , C21D8/0247 , C21D9/46 , C21D2211/001 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/44 , C22C38/48 , C22C38/50
摘要： Provided is a low-yield-ratio high-strength-toughness thick steel plate with excellent low-temperature impact toughness, which comprises: 0.05%-0.11% of C, 0.10%-0.40% of Si, 1.60%-2.20% of Mn, S≦0.003%, 0.20-0.70% of Cr, 0.20%-0.80% of Mo, 0.02%-0.06% of Nb, 3.60%-5.50% of Ni, 0.01%-0.05% of Ti, 0.01%-0.08% of Al, 0
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公开(公告)号：US09822423B2
公开(公告)日：2017-11-21
申请号：US14379777
申请日：2012-03-26
申请人： Hongxu Hei , Bo Wang , Shishu Xie , Xiandong Liu , Guohua Yang , Yongjie Yang , Aihua Ma , Xiaolin Li , Liang Zou , Huawei Zhang
发明人： Hongxu Hei , Bo Wang , Shishu Xie , Xiandong Liu , Guohua Yang , Yongjie Yang , Aihua Ma , Xiaolin Li , Liang Zou , Huawei Zhang
CPC分类号： C21D8/1261 , C21D1/28 , C21D1/34 , C21D1/76 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D9/46 , H01F41/00
摘要： A method for producing a silicon steel normalizing substrate comprises: steelmaking, hot rolling and normalizing steps. The normalizing step uses a normalizing furnace having a nonoxidizing heating furnace section. The nonoxidizing heating furnace section comprises more than 3 furnace zones. An energy investment ratio of the furnace zones used in the nonoxidizing heating furnace section is adjusted, so as to control an excess coefficient α of the nonoxidizing heating furnace section to be within a range of 0.8≦α
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公开(公告)号：US09815172B2
公开(公告)日：2017-11-14
申请号：US14649675
申请日：2014-03-05
发明人： Jizhe Quan , Shanqing Li , Mingnan Duan , Yingjie Wang , Jianghua Xu , Peilei Qu
CPC分类号： B24C1/00 , B21B45/0269 , B21B45/0284 , B21B45/0287 , B21B45/08
摘要： The present invention relates to a method of steel sheet surface treatment, wherein, the method comprises sequentially: a strip surface treatment unit (1) configured with a high pressure spraying device (1-1) or a centrifugal ejecting device (1-2), a strip surface rinsing unit (2), and a strip surface dry unit (3). Either or both of the high pressure spraying devices (1-1) and the centrifugal ejecting devices (1-2) are arranged, and spray onto the strip surfaces with a mixture of solid abrasives and water, i.e., slurry. Additionally, the method of steel sheet surface treatment comprises: a slurry supplying unit (4) and an abrasive recycling unit (5). When the method of the present invention is applied into the strip post processing line, it can control the surface roughness of the steel sheet, while clearing away grease, scales and some contaminations thereon, through impacting the mixture of water and solid particles with a certain ratio onto the surfaces of the strip steel. When the method of the present invention is applied into the finishing processing line, it can control the surface roughness of the steel sheet, while adjusting the mechanical properties of the strip, thereby completely or partially replacing the skin pass process.
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58.发明授权公开(公告)号：US09790566B2
公开(公告)日：2017-10-17
申请号：US14372699
申请日：2013-02-18
发明人： Xiufang Wang , Yuan Fang , Yan Yu , Jianchun Wu , Bo Qin
IPC分类号： C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58 , B22D11/06 , C21D9/52 , B22D11/00 , B22D11/116 , B22D11/12
CPC分类号： C21D8/0215 , B22D11/001 , B22D11/0622 , B22D11/116 , B22D11/12 , C21D8/0226 , C21D8/0263 , C21D9/52 , C21D2211/002 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58
摘要： A manufacturing method for strip casting 700 MPa-grade high strength atmospheric corrosion-resistant steel, comprising the following steps: 1) smelting, where the chemical composition of a molten steel in terms of weight percentage is that C is between 0.03-0.1%, Si≦0.4%, Mn is between 0.75-2.0%, P is between 0.07-0.22%, S≦0.01%, N≦0.012%, Cu is between 0.25-0.8%, Cr is between 0.3-0.8%, and Ni is between 0.12-0.4%, additionally, also comprised is at least one micro-alloying element among Nb, V, Ti, and Mo, where Nb is between 0.01-0.1%, V is between 0.01-0.1%, Ti is between 0.01-0.1%, and Mo is between 0.1-0.5%, and where the remainder is Fe and unavoidable impurities; 2) strip casting, where a 1-5 mm-thick cast strip is casted directly; 3) cooling the cast strip, where the cooling rate is greater than 20° C./s; 4) online hot rolling the cast strip, where the hot rolling temperature is between 1050-1250° C., where the reduction rate is between 20-50%, and where the deformation rate is >20s−1; austenite online recrystallizing after hot rolling, where the thickness of the hot rolled strip is between 0.5-3.0 mm; and, 5) cooling and winding, where the cooling rate is between 10-80° C./s, and where the winding temperature is between 520-670° C. The microscopic structure of a steel strip acquired is primarily constituted by evenly distributed bainite and acicular ferrite.
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59.发明申请公开(公告)号：US20170159157A1
公开(公告)日：2017-06-08
申请号：US15322683
申请日：2015-01-19
发明人： Xiaoming DONG , Zhonghua Zhang , Lin Bai
CPC分类号： C22C38/14 , B22D11/001 , C21D1/25 , C21D8/10 , C21D9/085 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38
摘要： There is disclosed an ultrahigh strength and ultrahigh toughness oil casing pipe, comprising the following chemical elements in mass percentages: C: 0.12-0.18%; Si: 0.1-0.4%; Mn: 1.1-1.6%; Cr: 0.1-0.4%; Mo: 0.2-0.5%; Nb: 0.02-0.04%; Ti: 0.02-0.05%; B: 0.0015-0.005%; Al: 0.01-0.05%; Ca: 0.0005-0.005%; N≦0.008%; with the proviso of 0
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60.发明申请公开(公告)号：US20170114427A1
公开(公告)日：2017-04-27
申请号：US15314934
申请日：2014-12-23
发明人： Jun Li , Ning Tan , Chuang Guan , Yuan Fang , Xinjian Ma
IPC分类号： C21D9/56 , B22D11/11 , C21D1/26 , C23C2/40 , C21D8/02 , C23C2/06 , C23C2/12 , B22D11/06 , C21D1/76
摘要： Method for directly producing a pickling-free hot-plated sheet strip product from molten steel comprising: obtaining a refined molten steel; thin strip continuous casting: a mixed gas of an inert gas and a reducing gas is used for protection in the billet casting process; hot rolling: the cast strip is levelled at a high temperature so as to improve the sheet shape and rolled to a suitable thickness so as to change the product specification, or provide a mechanical disruption action on the iron oxide skin on the surface of the cast strip; reduction annealing: a sectional reduction method is used to perform sectional reductions with the temperature held within two ranges, i.e., 450-600° C. and 700-1000° C., wherein the reduction is performed within a range of 450-600° C. for 1-5 minutes and within a range of 700-1000° C. for 1-3 minutes to remove the iron oxide skin produced in the previous procedure, the concentration of the reducing gas being not lower than 5%; and hot galvanization: after having been cooled in a protective atmosphere, the strip billet is brought into a zinc bath and hot-plated with zinc and other alloy, and then cooled and coiled. The present invention realizes a highly continuous production of a hot-plated product from molten steel with iron and steel, and hot plating with zinc or an alloy is directly performed without removing elementary iron produced by the reduction, so that the energy consumption in the middle stage can be saved and the recovery of metal reaches close to 100%.
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