-
公开(公告)号：US12104217B2
公开(公告)日：2024-10-01
申请号：US17593860
申请日：2020-03-27
IPC分类号： C21D9/46 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/147 , H01F1/18 , H01F41/02
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/14775 , H01F1/18 , H01F41/02 , C21D2201/05 , C22C2202/02
摘要： Provided is a grain-oriented electrical steel sheet having a film that is effective for the magnetic properties of the steel sheet and particularly effective for iron loss reduction and has favorable adhesion. In a grain-oriented electrical steel sheet, an insulating film partially enters into a steel substrate to form an anchor part, a depth of the anchor part from the surface of the steel substrate is 3.5 μm or less, and a number of neck parts of 5 μm2 or less in area is 0.06/μm2 or less and a number of neck parts of 10 μm2 to 40 μm2 in area is 0.005/μm2 or more and 0.011/μm2 or less, where each neck part is a remaining part of the insulating film on the surface of the steel substrate when peeling the insulating film from the steel substrate in a bend test for the grain-oriented electrical steel sheet.
-
公开(公告)号：US12091722B2
公开(公告)日：2024-09-17
申请号：US17421309
申请日：2020-01-08
发明人： Nobusato Morishige , Ryutaro Yamagata , Ichiro Tanaka , Takashi Kataoka , Haruhiko Atsumi , Yoshihiro Suwa , Kazumi Mizukami
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C21D8/12 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60 , H01F1/147 , H01F1/18
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60 , H01F1/147 , H01F1/18 , C22C2202/02
摘要： Grain-oriented electrical steel sheet and its method of manufacture are provided. The method includes a process of heating to 1280° C. or more and hot rolling a slab containing, by mass %, Bi and a predetermined composition of constituents and having a balance of Fe and impurities to obtain hot rolled steel sheet. After hot rolling annealing, the hot rolled steel sheet is cold rolled one time or more with process annealing performed interposed so as to obtain cold rolled steel sheet, followed by a process of rapidly heating then decarburization annealing the steel sheet, a process of coating the surface of the cold rolled steel sheet after decarburization annealing with an annealing separator comprising sulfates or sulfides and having MgO as its main constituent, then performing finish annealing, a process of performing strictly controlled finish annealing, and a process of coating an insulating coating, then performing flattening annealing.
-
公开(公告)号：US20240249863A1
公开(公告)日：2024-07-25
申请号：US18561412
申请日：2022-05-27
IPC分类号： H01F1/147 , C21D1/74 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/34 , C22C38/60
CPC分类号： H01F1/14791 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/34 , C22C38/60 , C22C2202/02
摘要： To provide a grain-oriented electrical steel sheet with good processing accuracy in rounding while maintaining excellent magnetic properties, and a producing method thereof. Disclosed is the method including: subjecting a steel material to heating to 1300° C. or higher and hot rolling, subjecting the resulting sheet directly, or after subjection to hot-rolled sheet annealing, to at least two cycles of cold rolling with intermediate annealing therebetween, decarburization annealing, application of an annealing separator to a surface of the sheet, final annealing, in which maximum arrival temperatures in the first and second cycles of the cold rolling satisfy a predetermined relation, total rolling reductions in the first and second cycles of the cold rolling satisfy a predetermined relation, and in the final annealing, an average heating rates in temperature ranges from 50° C. to 1000° C. and from 1000° C. to (maximum arrival temperature—50° C.) satisfy a predetermined relation.
-
4.发明公开公开(公告)号：US20240240292A1
公开(公告)日：2024-07-18
申请号：US18263707
申请日：2022-02-02
CPC分类号： C22C38/02 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/04 , C22C38/12 , C22C38/14 , C21D2201/05
摘要： To provide a method of producing a grain-oriented electrical steel sheet whereby greater purification of an inhibitor-strengthening element can be promoted by improvement of an annealing separator and, as a result, iron loss can be effectively improved. The annealing separator contains 1 to 10 parts by mass of a composite oxide, relative to 100 parts by mass of MgO, the composite oxide containing at least one selected from a Group 1: Fe, Mn, Al and Ca, and at least one of a Group 2: Zr, Ta, Mo and Nb.
-
公开(公告)号：US20240183012A1
公开(公告)日：2024-06-06
申请号：US18285451
申请日：2022-04-06
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1272 , C21D8/1283 , C21D8/1288 , C22C38/001 , C22C38/004 , C22C38/04 , C22C38/06 , C21D2201/05
摘要： This grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the insulating coating includes an intermediate layer formed on a base steel sheet side and containing a crystalline metal phosphate, and a tension coating layer formed on a surface side of the insulating coating, an average thickness of the intermediate layer is 0.3 to 10.0 μm, an average thickness of the insulating coating is 2.0 to 10.0 μm, the crystalline metal phosphate of the intermediate layer is one or two or more of zinc phosphate, manganese phosphate, iron phosphate, and zinc calcium phosphate, the tension coating layer contains a metal phosphate and silica, and an amount of the silica in the tension coating layer is 20 to 60 mass %.
-
公开(公告)号：US20240177899A1
公开(公告)日：2024-05-30
申请号：US18283423
申请日：2022-03-28
IPC分类号： H01F1/147 , C21D6/00 , C21D8/12 , C21D9/46 , C21D10/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C23D3/00 , C23D5/04 , C23D13/00
CPC分类号： H01F1/14783 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1283 , C21D8/1288 , C21D9/46 , C21D10/005 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C23D3/00 , C23D5/04 , C23D13/00 , C21D2201/05 , C22C2202/02
摘要： This grain-oriented electrical steel sheet includes a base steel sheet having a predetermined chemical composition, a glass coating formed on the base steel sheet, and a tension-applied insulation coating formed on the glass coating, on a front surface of the base steel sheet, a plurality of linear strains that extend continuously or intermittently in a direction intersecting with a rolling direction are present, intervals p in the rolling direction of the plurality of linear strains adjacent to each other are 3.0 to 9.0 mm, widths of the linear strains are 10 to 250 μm, and, in an X-ray topographic spectrum in a range of 1.50 mm in the rolling direction that is obtained from an X-ray topographic image of the front surface and includes the linear strain at a center, a full width at half maximum of a peak of the X-ray topographic spectrum including a maximum value of a spectral intensity is 0.02 mm or more and 0.10 mm or less.
-
公开(公告)号：US11948711B2
公开(公告)日：2024-04-02
申请号：US17761092
申请日：2020-09-16
发明人： Takashi Kataoka , Ichiro Tanaka , Haruhiko Atsumi , Kazutoshi Takeda , Ryutaro Yamagata , Nobusato Morishige
IPC分类号： C22C38/00 , C21D3/04 , C21D6/00 , C21D8/00 , C21D8/12 , C21D9/46 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/28 , C22C38/34 , H01F1/147
CPC分类号： H01F1/14783 , C21D3/04 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1233 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/28 , C22C38/34
摘要： A grain oriented electrical steel sheet includes a base steel sheet, a glass film, and a tension-insulation coating. When a glow discharge emission spectroscopy is conducted from a surface of the glass film toward a depth direction, an analysis starting time Ts, a time TAlp at which Al shows a maximum emission intensity, an Al emission intensity F(TAlp) at the TAlp, a time TSip at which Si shows a maximum emission intensity, and an Al emission intensity F(TSip) at the TSip satisfy 0.05≤F(TSip)/F(TAlp)≤0.50 and 2.0≤(TAlp−Ts)/(TSip−Ts)≤5.0.
-
公开(公告)号：US11946114B2
公开(公告)日：2024-04-02
申请号：US17550366
申请日：2021-12-14
申请人： POSCO
发明人： Min Serk Kwon , Tae Young No , Chang Soo Park , Heon-Jo Choi
IPC分类号： C21D9/46 , C04B35/465 , C21D1/68 , C21D3/04 , C21D6/00 , C21D8/02 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60
CPC分类号： C21D9/46 , C04B35/465 , C21D1/68 , C21D3/04 , C21D6/008 , C21D8/0205 , C21D8/12 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60 , C04B2235/3206 , C04B2235/3232 , C04B2235/3236 , C04B2235/448 , C21D2201/05 , C21D2211/001
摘要： Provided is an annealing separating agent composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. The annealing separating agent composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention contains 30 to 70% by weight of a calcium compound, and the remainder of magnesium oxide or magnesium hydroxide on a solid basis.
-
公开(公告)号：US20240105369A1
公开(公告)日：2024-03-28
申请号：US17768570
申请日：2020-10-27
IPC分类号： H01F1/147 , C21D1/74 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/34 , C22C38/40 , C22C38/60 , C23G1/08
CPC分类号： H01F1/14783 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/34 , C22C38/40 , C22C38/60 , C23G1/08 , C22C2202/02
摘要： In a production of a grain-oriented electrical steel sheet comprising hot rolling a raw steel material, cold rolling, decarburization annealing, applying an annealing separator composed mainly of MgO, finish annealing and magnetic domain subdividing, the annealing separator including certain compounds, and the finish annealing conducted by holding the steel sheet at a temperature of 800 to 950° C. for 10 to 100 hours and passing a dry gas containing not less than 1 vol % of H2 and having a dew point of not higher than 10° C. to reach a furnace pressure of not less than 3.5 mmH2O from not lower than 1050° C. to a purification treatment temperature, so that a pickling weight loss of undercoat film by pickling with HCl is not more than 1.8 g/m2 and the total concentration of Sn, Sb, Mo, and W on a boundary face between the film and iron matrix is 0.01 to 0.15 mass %.
-
公开(公告)号：US20240052447A1
公开(公告)日：2024-02-15
申请号：US18258210
申请日：2021-09-22
IPC分类号： C21D8/12
CPC分类号： C21D8/1272 , C21D8/1233 , C21D8/1283 , C21D2201/05
摘要： Provided is a grain-oriented electrical steel sheet that can benefit from the iron loss improving effect by groove formation while effectively suppressing a decrease in magnetic flux density. A grain-oriented electrical steel sheet comprises predetermined linear grooves, wherein in each linear groove, a proportion of predetermined flat portions to an entire length of the linear groove is 30% or more and 90% or less, the number of flat portions each of which is continuous for a predetermined length is 10 or more per 100 cm2 surface area, and a ratio of ten-point average roughness Rzjis to average depth D is 0.1 or more and 1 or less.
-
-
-
-
-
-
-
-
-
搜索结果
431 条记录 (耗时 0.035 秒)
