公开(公告)号：US20240254601A1

公开(公告)日：2024-08-01

申请号：US18561064

申请日：2022-05-27

申请人： JFE STEEL CORPORATION

发明人： Takeshi IMAMURA ,  Ayaka YOSHIKAWA ,  Masanori TAKENAKA ,  Kazuaki TAMURA

IPC分类号： C22C38/02 ,  C21D3/04 ,  C21D6/00 ,  C21D8/12 ,  C22C38/04 ,  C22C38/60 ,  C23G1/08

CPC分类号： C22C38/02 ,  C21D3/04 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/04 ,  C22C38/60 ,  C23G1/08

摘要： Disclosed is a method for producing a grain-oriented electrical steel sheet, including subjecting a steel material containing, by mass %, Si: 2.0-5.0%, Mn: 0.01-0.50%, and one or both of S and Se: 0.001-0.100% in total, to hot rolling, followed by cold rolling once, or twice or more with intermediate annealing in between, followed by decarburization annealing, followed by application and drying of an annealing separator mainly composed of MgO, followed by final annealing, followed by flattening annealing, in which the final annealing is performed in a predetermined atmosphere, the flattening annealing is accompanied by coating treatment including application of a coating solution, and prior to the application of the coating solution, pickling treatment is performed using an acid with a predetermined concentration at a temperature of 15° C. or higher for 1 second or more and 60 seconds or less.

公开(公告)号：US12037689B2

公开(公告)日：2024-07-16

申请号：US17256924

申请日：2019-06-28

申请人： Nippon Telegraph and Telephone Corporation

发明人： Takashi Miwa ,  Azusa Ishii

IPC分类号： C23C2/04 ,  C23C2/02 ,  C23C2/28 ,  C23G1/08

CPC分类号： C23C2/04 ,  C23C2/024 ,  C23C2/29 ,  C23G1/08

摘要： The galvanized member includes a member formed of a metal and a hot-dip galvanized layer formed on the surface of the member. The hot-dip galvanized layer contains a sulfate salt having a higher water solubility than calcium sulfate. A sulfate salt content of the hot-dip galvanized layer is preferably 0.008 to 0.133 mol based on 100 g of zinc. The sulfate salt contained in the hot-dip galvanized layer is preferably at least one of potassium sulfate, sodium sulfate, magnesium sulfate, calcium sulfate, ferric sulfate, ferrous sulfate, lithium sulfate, calcium sulfate, and aluminum sulfate.

公开(公告)号：US12024781B2

公开(公告)日：2024-07-02

申请号：US17594545

申请日：2020-04-22

申请人： DANIELI & C. OFFICINE MECCANICHE S.P.A.

发明人： Alessandra Primavera ,  Emanuele Trucillo ,  Luciano Vignolo

IPC分类号： C23G3/02 ,  C23G1/08

CPC分类号： C23G3/024 ,  C23G1/08 ,  C23G3/026 ,  C23G3/028

摘要： The invention concerns a continuous pickling plant (101) for the treatment of metal products (109) in the form of a strip or tube which includes a plurality of acid solution process tanks (102) each divided into a plurality of turbulence cells (114) and a recirculation system of the acid solution. The plant also includes, upstream of the plurality of process tanks (102), a device for heating (124; 126) the metal product (109), namely an induction heating (124) system and/or a tunnel with water sprays (126). A solution with only two pickling tanks (102) is also presented. Devices are described (135; 136; 138, 138a) to increase turbulence in the tanks and to accelerate pickling, e.g. by adding fresh acid (146) in the first tank. The invention also concerns a related pickling process. The invention optimizes the effect of the acid and reduces the residence time of the strip (109) in the plant.

公开(公告)号：US20180355453A1

公开(公告)日：2018-12-13

申请号：US15781911

申请日：2016-12-07

申请人： POSCO

发明人： Seok-Jong SEO

IPC分类号： C21D9/46 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C23G1/08

CPC分类号： C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0247 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23G1/08

摘要： Provided is an ultra-high-strength steel sheet having high phosphatability and hole expandability, including, by wt %, carbon (C): 0.08% to 0.2%, silicon (Si): 0.05% to 1.3%, manganese (Mn): 2.0% to 3.0%, phosphorus (P): 0.001% to 0.10%, sulfur (S): 0.010% or less, aluminum (Al): 0.01% to 0.1%, chromium (Cr): 0.3% to 1.2%, boron (B): 0.0010% to 0.0030%, titanium (Ti): 0.01% to 0.05%, nitrogen (N): 0.001% to 0.01%, and a balance of iron (Fe) and inevitable impurities, satisfying 3.4≤Ti/N≤10, 1.0≤Mn/(Si+Cr), and 0.7≤Mn*/(Si*+Cr*)≤Mn/(Si+Cr) where Ti, N, Mn, Si, and Cr refer to a weight percent (wt %), and Mn*, Si*, and Cr* refer to an average of values obtained by GDS component analysis from the surface to the 0.1 μm position in the thickness direction.

公开(公告)号：US20180327877A1

公开(公告)日：2018-11-15

申请号：US15800500

申请日：2017-11-01

申请人： Hyundai Motor Company ,  Kia Motors Corporation ,  Hyundai Steel Company

发明人： Jae-Woong CHOI ,  Won-Seok YANG

IPC分类号： C21D8/00 ,  C22C38/48 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C21/02 ,  C21D6/00 ,  C23G1/08 ,  C23C18/48 ,  C23C18/16 ,  B32B15/01

CPC分类号： C21D8/005 ,  B32B15/012 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D2211/005 ,  C22C21/02 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/48 ,  C23C18/1637 ,  C23C18/1692 ,  C23C18/48 ,  C23G1/08

摘要： A low-alloy and corrosion-resistant steel for a vehicle, may include about 0.001 wt % to about 0.1 wt % of C, about 0.01 wt % to about 0.5 wt % of Si, about 0.1 wt % to about 0.6 wt % of Mn, more than 0 wt % and about 0.18 wt % or less of P, more than 0 wt % and less than about 0.02 wt % of S, about 0.001 wt % to about 0.03 wt % of Nb, more than 0 wt % and about 0.03 wt % or less of Cr, about 0.05 wt % to about 0.3 wt % of Cu, about 0.05 wt % to about 0.2 wt % of Ni, and more than 0 wt % and about 0.2 wt % or less of a combined weight of Sn and Sb, and the balance iron and inevitable impurities.

公开(公告)号：US20180053948A1

公开(公告)日：2018-02-22

申请号：US15546767

申请日：2016-02-09

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Yoshio TARUTANI

IPC分类号： H01M8/0228 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23F1/28 ,  C23G1/08 ,  C21D9/52 ,  C23F17/00 ,  C23C14/08 ,  C23C14/34 ,  H01M8/1018 ,  H01M8/021 ,  H01M8/0215

CPC分类号： H01M8/0228 ,  C21D9/52 ,  C22C13/00 ,  C22C28/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C14/02 ,  C23C14/08 ,  C23C14/086 ,  C23C14/34 ,  C23F1/28 ,  C23F17/00 ,  C23G1/08 ,  C23G1/081 ,  C23G1/085 ,  H01M8/021 ,  H01M8/0215 ,  H01M8/1018 ,  H01M2008/1095

摘要： There is provided a separator for polymer electrolyte fuel cells having a substrate of a ferritic, having a chemical composition comprising, in mass %, C: 0.001 to 0.012%, Si: 0.01 to 0.6%, Mn: 0.01 to 0.6%, P: 0.035% or less, S: 0.01% or less, Cr: 22.5 to 35.0%, Mo: 0.01 to 4.5%, Ni: 0.01 to 2.5%, Cu: 0.01 to 0.6%, Sn: 0.01 to 1.0%, In: 0.001 to 0.30%, N: 0.015% or less, V: 0.01 to 0.35%, and Al: 0.001 to 0.050%, and the calculated value of {Content of Cr (%)+3×Content of Mo (%)} being 22.5 to 45.0, and includes a surface modified layer containing O: less than 30% and the balance: Sn and In. A polymer electrolyte fuel cell including the separator is remarkably excellent in corrosion resistance in an in-cell environment.

公开(公告)号：US20180037969A1

公开(公告)日：2018-02-08

申请号：US15556448

申请日：2016-02-16

申请人： JFE Steel Corporation

发明人： Shimpei Yoshioka ,  Katsutoshi Takashima ,  Kohei Hasegawa ,  Yoshimasa Funakawa

IPC分类号： C21D9/46 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C23G1/08 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C22C38/38 ,  C22C38/08

CPC分类号： C21D9/46 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/38 ,  C22C38/60 ,  C23G1/00 ,  C23G1/08 ,  C23G1/081

摘要： A steel sheet contains C: 0.15% to 0.22%, Si: 1.0% to 2.0%, Mn: 1.7% to 2.5%, P: 0.05% or less, S: 0.02% or less, Al: 0.01% to 0.05%, N: 0.005% or less, O: 0.01% or less, and the balance being iron and unavoidable impurities while satisfying [Si]/[Mn]≧0.5 ([Si] and [Mn] represent Si and Mn contents, wherein the steel sheet has a structure including, in terms of area fraction, 60% to less than 100% of tempered martensite, 5% or less including 0% of untransformed austenite, and the balance being ferrite, and the ferrite has an average crystal grain size of less than 3.5 μm, wherein less than 10 particles/100 μm2 of Si—Mn compound oxide particles having a circle equivalent diameter of 5 μm or less are present on a surface of the steel sheet, and the surface is covered with Si-based oxide at a coverage of 1% or less.

公开(公告)号：US20170369965A1

公开(公告)日：2017-12-28

申请号：US15541918

申请日：2016-01-05

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Muneaki IKEDA ,  Yuichi FUTAMURA ,  Michiharu NAKAYA

IPC分类号： C21D9/46 ,  C21D8/02 ,  C23C2/06 ,  C23C2/02 ,  C22C38/32 ,  C22C38/28 ,  C22C38/22 ,  C22C38/18 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/40 ,  C23F17/00

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  C23F17/00 ,  C23G1/06 ,  C23G1/08

摘要： A high-strength plated steel sheet has a plated layer on the surface of a base steel sheet and contains predetermined steel components. The steel sheet includes, in the order from the interface of the base steel sheet and the plated layer towards the base steel sheet: a soft layer having a Vickers hardness that is 90% or less of the Vickers hardness at a portion t/4 of the base steel sheet, where t is a sheet thickness of the base steel sheet; and a hard layer containing martensite and bainite, and ferrite in predetermined ranges. The average depth D of the soft layer is 20 μm or greater, and the average depth d of an internal oxide layer is 4 μm or greater and smaller than D.

公开(公告)号：US20170210980A1

公开(公告)日：2017-07-27

申请号：US15515458

申请日：2015-09-29

申请人： Fluid Energy Group Ltd.

发明人： Clay PURDY ,  Darren THATCHER ,  John GARNER ,  Bruce ULMER

IPC分类号： C09K8/72 ,  C23F15/00 ,  C09K8/528

CPC分类号： C09K8/72 ,  C09K8/528 ,  C09K8/74 ,  C09K2208/02 ,  C09K2208/32 ,  C23F11/04 ,  C23F15/00 ,  C23G1/08

摘要： A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1:1 and formic acid or a derivative thereof.

公开(公告)号：US20160355900A1

公开(公告)日：2016-12-08

申请号：US15243610

申请日：2016-08-22

申请人： ArcelorMittal

发明人： Javier Gil Otin ,  Antoine Moulin

IPC分类号： 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分类号： 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

摘要： 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.

摘要翻译： 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。