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1.发明公开公开(公告)号：US20240344171A1
公开(公告)日：2024-10-17
申请号：US18756430
申请日：2024-06-27
申请人： MM Metals USA, LLC
CPC分类号： C22B5/04 , C21D1/74 , C21D6/002 , C21D8/1205 , C21D9/0025 , C21D9/0068 , C22B1/24 , C22C33/04 , C22C38/18
摘要： A method and system for recovering low carbon ferrochrome from feed materials including chromite ore and aluminum granules in a chamber of an arc furnace using an aluminothermic smelting process carried out in the presence of an inert gas, e.g., Argon. The aluminothermic smelting process produces a bath of molten low carbon ferrochrome metal with molten slag floating thereon in the chamber. The molten low carbon ferrochrome metal and molten slag are extracted individually and processed to provide a solidified low carbon ferrochrome metal product and a solidified slag particles product, respectively. A method for the recirculation, recovery and reuse of the inert gas, and a system for accomplishing the recirculation, recovery and reuse of the inert gas.
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公开(公告)号：US12110579B2
公开(公告)日：2024-10-08
申请号：US17397295
申请日：2021-08-09
发明人： Niklas Volbers , Manuel Demper , Joachim Gerster
CPC分类号： C22F1/16 , C21D1/04 , C21D8/1244 , C22C30/00 , H01F1/147 , H02K15/02 , C21D6/007 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C22C2202/02
摘要： A method of producing a CoFe alloy strip is provided. The method comprises hot rolling a CoFe alloy to form a hot rolled strip, followed by quenching the strip from a temperature above 700° C. to a temperature of 200° C. The CoFe alloy comprises an order/disorder temperature To/d and a ferritic/austenitic transformation temperature Tα/γ, wherein Tα/γ>To/d. The method further comprises cold rolling the hot rolled strip, after cold rolling, continuous annealing the strip at a maximum temperature T1, wherein 500° C.
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公开(公告)号：US20240327960A1
公开(公告)日：2024-10-03
申请号：US18439389
申请日：2024-02-12
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1227 , C21D8/1233 , C21D8/1272 , C22C2202/02
摘要： A soft magnetic steel sheet is manufactured by mixing an amount of molten scrap iron, an amount of substantially pure molten iron and an amount of substantially pure molten silicon so as to produce a molten alloy containing Fe as a base material, 1.0 to 7.0 wt % of Si, and 0.1 to 1.0 wt % of Cu, forming a soft magnetic steel sheet by subjecting the molten alloy to a liquid rapid cooling single roller process, and heat treating the soft magnetic steel sheet in an inert atmosphere at 600 to 1,200° C.
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4.发明授权公开(公告)号：US12104219B2
公开(公告)日：2024-10-01
申请号：US18096276
申请日：2023-01-12
IPC分类号： C21D9/46 , C21D3/04 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/147
CPC分类号： C21D9/46 , C21D3/04 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1233 , C21D8/1255 , C21D8/1272 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/147 , C22C2202/02
摘要： Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to the steel sheet is provided. The grain-oriented electrical steel sheet is provided with a base steel sheet having a chemical composition containing C: 0.005% or less, Si: 2.5 to 4.5%, Mn: 0.050 to 1.000%, a total of S and Se: 0.005% or less, sol. Al: 0.005% or less, and N: 0.005% or less and having a balance of Fe and impurities and a primary coating having Mg2 SiO4 as a main constituent formed on a surface of the base steel sheet. A peak position of Al emission intensity obtained when conducting elemental analysis by glow discharge spectrometry from a surface of the primary coating in a thickness direction is present in a range of 2.0 to 12.0 μm from a surface of the primary coating to the thickness direction. A sum of perimeters of the Al oxides at the peak position of Al emission intensity is 0.20 to 1.00 μm/μm2, and a number density of Al oxides is 0.02 to 0.20/μm2.
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公开(公告)号：US12104216B2
公开(公告)日：2024-10-01
申请号：US17417375
申请日：2019-12-26
IPC分类号： C21D9/46 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147 , C22C2202/02
摘要： Provided is an annealing separator with which a grain-oriented electrical steel sheet having a forsterite film with excellent appearance uniformity and adhesion can be obtained. The annealing separator for grain-oriented electrical steel sheet comprises: magnesia that contains 0.05 mass % or more and 0.20 mass % or less of B and 0.01 mass % or more and 0.10 mass % or less of P, and titanium oxide in 1.0 part by mass or more and 10.0 parts by mass or less per 100 parts by mass of the magnesia where the titanium oxide contains one or more types of alkali metals in a total amount of 0.0050 mass % or more and 0.50 mass % or less, where an amount of P adsorbed on per 1 g of the titanium oxide is 1.5×10−4 g or more and 1.0×10−3 g or less.
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公开(公告)号：US20240301530A1
公开(公告)日：2024-09-12
申请号：US18647591
申请日：2024-04-26
申请人： MM Metals USA, LLC
发明人： Daniel SHAW , James SAVILLE , John WILLIAMS , Trevor N. MUSTOE
CPC分类号： C22B5/04 , C21D1/74 , C21D6/002 , C21D8/1205 , C21D9/0025 , C21D9/0068 , C22B1/24 , C22C33/04 , C22C38/18
摘要： A method and system for recovering a high yield of low carbon ferroalloy, e.g., low carbon ferrochrome, from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.
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公开(公告)号：US12084750B2
公开(公告)日：2024-09-10
申请号：US18277548
申请日：2022-03-30
CPC分类号： C22C38/02 , B05D3/0254 , B05D7/14 , C21D8/1283 , C22C38/04 , C22C38/06 , C23C22/20 , B05D2202/10
摘要： This non-oriented electrical steel sheet includes: a base steel sheet; and an insulation coating formed on a surface of the base steel sheet, in which the insulation coating contains a metal phosphate and an organic resin, a moisture content of the insulation coating is 0.003 to 0.03 wt %, and a contact angle of water on the insulation coating is 55° to 85°.
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8.发明公开公开(公告)号：US20240287659A1
公开(公告)日：2024-08-29
申请号：US18569600
申请日：2022-06-30
CPC分类号： C22C38/02 , C21D3/04 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1266 , C21D8/1272 , C21D9/46 , C22C38/04
摘要： To provide a method of producing a grain-oriented electrical steel sheet that can stably produce a grain-oriented electrical steel sheet with low iron loss and little variation in iron loss using a tandem mill. Disclosed is a method of producing a grain-oriented electrical steel sheet, including: hot rolling; a single cycle of cold rolling, or multiple cycles of cold rolling with intermediate annealing in between; decarburization annealing; and recrystallization annealing, in which final cold rolling is performed using a tandem mill, where the steel sheet is heated to a temperature range from 70° C. to 200° C. and then introduced into the first pass of the tandem mill in which rolling in the first pass is performed with a biting temperature T (° C.) and a strain rate e (s−1) satisfying: 0.0378e2+0.367e+37.2>T (1).
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9.发明公开公开(公告)号：US20240263289A1
公开(公告)日：2024-08-08
申请号：US18410235
申请日：2024-01-11
申请人： PROTERIAL, LTD.
发明人： Hajime ITAGAKI , Morifumi KUROKI , Makoto SASAKI , Shin NAKAJIMA
IPC分类号： C22C45/00 , B23K26/362 , C21D8/12 , C22C45/02 , H01F1/153 , H01F27/25 , H01F27/255 , H01F30/10 , H01F30/12
CPC分类号： C22C45/008 , B23K26/362 , C21D8/1294 , C22C45/02 , H01F1/15308 , H01F27/25 , H01F27/255 , H01F30/10 , H01F30/12
摘要： An Fe-based amorphous alloy ribbon reduced in iron loss, less deformed, and highly productive in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon having first and second surfaces, and is provided with continuous linear laser irradiation marks on at least the first surface. Each linear laser irradiation mark is formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon, and has unevenness on its surface. When the unevenness is evaluated in the casting direction, a height difference HL×width WA calculated from the height difference HL between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon and the width WA which is a length of the linear irradiation mark on the first surface is 6.0 to 180 μm2.
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公开(公告)号：US20240263285A1
公开(公告)日：2024-08-08
申请号：US18561389
申请日：2022-05-27
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/04
摘要： Provided is a method of manufacturing a grain-oriented electrical steel sheet having an excellent film adhesion can be obtained. The method of manufacturing a grain-oriented electrical steel sheet includes subjecting a steel slab to hot rolling to obtain a hot-rolled steel sheet, subjecting the hot-rolled steel sheet to cold rolling once to obtain a cold-rolled steel sheet, subjecting the cold-rolled steel sheet to pickling, subjecting the cold-rolled steel sheet to decarburization annealing, applying an annealing separator to a surface of the cold-rolled steel sheet after the decarburization annealing, and subjecting the cold-rolled steel sheet to final annealing, where in the pickling, a solution with an acid concentration of 1.0 mass % to 20 mass % and an Fe ion concentration of 2 mass % to 15 mass % is used, and in the decarburization annealing, a concentration of CO in an atmosphere gas is maintained at 6 vol % or less.
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