公开(公告)号：US09587319B2

公开(公告)日：2017-03-07

申请号：US15000722

申请日：2016-01-19

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Nobuhiro Fujita ,  Kunio Hayashi ,  Riki Okamoto ,  Manabu Takahashi ,  Tetsuo Kishimoto ,  Hiroshi Yoshida

IPC: C25D3/22 ,  C21D8/02 ,  C23C2/06 ,  C23C2/28 ,  C22C38/00 ,  C22C38/04 ,  B21B35/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C25D5/36 ,  C23C2/40 ,  C21D6/00 ,  C21D9/46

CPC classification number: C25D3/22 ,  B21B35/00 ,  B32B15/013 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0263 ,  C21D8/0273 ,  C21D9/46 ,  C21D2201/05 ,  C21D2211/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36

Abstract: A hot-rolled steel sheet has an average value of the X-ray random intensity ratio of a {100} to {223} orientation group at least in a sheet thickness central portion that is in a sheet thickness range of ⅝ to ⅜ from a steel sheet surface of 1.0 to 6.0, an X-ray random intensity ratio of a {332} crystal orientation of 1.0 to 5.0, rC which is an r value in a direction perpendicular to a rolling direction of 0.70 to 1.10, and r30 which is an r value in a direction that forms an angle of 30° with respect to the rolling direction of 0.70 to 1.10.

Abstract translation: 热轧钢板至少在片材厚度范围的板厚中央部具有{100} <011>〜{223} <110>取向基团的X射线随机强度比的平均值 从1.0〜6.0的钢板表面的⅝至⅝，{332} <113>晶体取向的X射线随机强度比为1.0〜5.0，rC为与轧制方向垂直的方向的r值 为0.70〜1.10，r30为相对于轧制方向为30°的方向的r值，为0.70〜1.10。

公开(公告)号：US09546413B2

公开(公告)日：2017-01-17

申请号：US14007583

申请日：2012-03-28

Applicant: Takayuki Nozaki ,  Manabu Takahashi ,  Nobuhiro Fujita ,  Hiroshi Yoshida ,  Shinichiro Watanabe ,  Takeshi Yamamoto ,  Chisato Wakabayashi ,  Riki Okamoto ,  Kohichi Sano

Inventor： Takayuki Nozaki ,  Manabu Takahashi ,  Nobuhiro Fujita ,  Hiroshi Yoshida ,  Shinichiro Watanabe ,  Takeshi Yamamoto ,  Chisato Wakabayashi ,  Riki Okamoto ,  Kohichi Sano

IPC: C22C38/26 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/08 ,  C22C38/10 ,  C22C38/16 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C21D9/46 ,  B32B15/01 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D8/04

CPC classification number: C22C38/26 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0463 ,  C21D9/46 ,  C21D2201/05 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

Abstract: Disclosed is a hot-rolled steel sheet including, by mass %, C:0.02% to 0.5% of C, and the sum of the content of Si and the content of Al is 1.0% to 4.0%. An average pole density of an orientation group from {100} to {223} is 1.0 to 6.5, and a pole density of a crystal orientation {332} is 1.0 to 5.0. A microstructure includes, by of an area ratio, 2% to 30% of retained austenite, 20% to 50% of ferrite, and 10% to 60% of bainite. rC that is a Lankford value in a direction orthogonal to a rolling direction is 0.70 to 1.10, and r30 that is a Lankford value in a direction forming an angle of 30° with the rolling direction is 0.70 to 1.10.

Abstract translation: 公开了以质量％计，C：0.02〜0.5％的C，Si的含量和Al的含量之和为1.0〜4.0％的热轧钢板。 {100} <011>至{223} <110>的取向基团的平均极密度为1.0〜6.5，晶体取向{332} <113>的极点密度为1.0〜5.0。 微观结构包括通过面积比为2％至30％的残余奥氏体，20％至50％的铁素体和10％至60％的贝氏体。 在与轧制方向正交的方向上的兰克福德值的rC为0.70〜1.10，在与轧制方向成30°角的方向上的兰克福德值为r = 0.70〜1.10。

公开(公告)号：US20160130711A1

公开(公告)日：2016-05-12

申请号：US15000722

申请日：2016-01-19

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Nobuhiro FUJITA ,  Kunio HAYASHI ,  Riki OKAMOTO ,  Manabu TAKAHASHI ,  Tetsuo KISHIMOTO ,  Hiroshi YOSHIDA

IPC: C25D3/22 ,  C22C38/54 ,  C22C38/52 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C23C2/02 ,  C22C38/58

CPC classification number: C25D3/22 ,  B21B35/00 ,  B32B15/013 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0263 ,  C21D8/0273 ,  C21D9/46 ,  C21D2201/05 ,  C21D2211/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36

Abstract: A hot-rolled steel sheet has an average value of the X-ray random intensity ratio of a {100} to {223} orientation group at least in a sheet thickness central portion that is in a sheet thickness range of ⅝ to ⅜ from a steel sheet surface of 1.0 to 6.0, an X-ray random intensity ratio of a {332} crystal orientation of 1.0 to 5.0, rC which is an r value in a direction perpendicular to a rolling direction of 0.70 to 1.10, and r30 which is an r value in a direction that forms an angle of 30° with respect to the rolling direction of 0.70 to 1.10.

Abstract translation: 热轧钢板至少在片材厚度范围的板厚中央部具有{100} <011>〜{223} <110>取向基团的X射线随机强度比的平均值 从1.0〜6.0的钢板表面的⅝至⅝，{332} <113>晶体取向的X射线随机强度比为1.0〜5.0，rC为与轧制方向垂直的方向的r值 为0.70〜1.10，r30为相对于轧制方向为30°的方向的r值，为0.70〜1.10。

公开(公告)号：US09273371B2

公开(公告)日：2016-03-01

申请号：US13635172

申请日：2011-03-15

Applicant: Kenichi Murakami ,  Chie Hama ,  Kazumi Mizukami ,  Yoshiyuki Ushigami ,  Shuichi Nakamura

Inventor： Kenichi Murakami ,  Chie Hama ,  Kazumi Mizukami ,  Yoshiyuki Ushigami ,  Shuichi Nakamura

IPC: C23C8/02 ,  C23C8/26 ,  C21D8/12 ,  C21D3/04 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60 ,  H01F1/18 ,  C23C8/80 ,  B21B3/00 ,  B21B3/02

CPC classification number: C21D8/1222 ,  B21B3/00 ,  B21B3/02 ,  C21D3/04 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60 ,  C23C8/02 ,  C23C8/80 ,  H01F1/18

Abstract: A predetermined steel containing Te: 0.0005 mass % to 0.0050 mass % is heated to 1320° C. or lower to be subjected to hot rolling, and is subjected to annealing, cold rolling, decarburization annealing, and nitridation annealing, and thereby a decarburized nitrided steel sheet is obtained. Further, an annealing separating agent is applied on the surface of the decarburized nitrided steel sheet and finish annealing is performed, and thereby a glass coating film is formed. The N content of the decarburized nitrided steel sheet is set to 0.0150 mass % to 0.0250 mass % and the relationship of 2×[Te]+[N]≦0.0300 mass % is set to be established. Note that [Te] represents the Te content and [N] represents the N content.

Abstract translation: 将含有Te：0.0005质量％至0.0050质量％的预定钢加热至1320℃以下进行热轧，进行退火，冷轧，脱碳退火和氮化退火，由此进行脱碳氮化 得到钢板。 此外，在脱碳氮化钢板的表面上涂布退火分离剂，进行最终退火，形成玻璃涂膜。 将脱碳氮化钢板的N含量设定为0.0150质量％〜0.0250质量％，设定2×[Te] + [N] / nlE; 0.0300质量％的关系。 注意，[Te]表示Te含量，[N]表示N含量。

公开(公告)号：US09187798B2

公开(公告)日：2015-11-17

申请号：US13703833

申请日：2011-06-17

Applicant: Masanori Takenaka ,  Minoru Takashima ,  Toshito Takamiya

Inventor： Masanori Takenaka ,  Minoru Takashima ,  Toshito Takamiya

IPC: H01F1/04 ,  C21D8/00 ,  C22C38/02 ,  C21D8/02 ,  C21D8/12 ,  C22C38/00 ,  C22C38/06 ,  H01F1/16

CPC classification number: C21D8/0205 ,  C21D8/12 ,  C21D8/1216 ,  C21D8/1244 ,  C21D2201/05 ,  C22C38/004 ,  C22C38/02 ,  C22C38/06 ,  C22C38/60 ,  H01F1/16

Abstract: The present invention provides a method for manufacturing a grain oriented electrical steel sheet, including preparing as a material a steel slab having a predetermined composition and carrying out at least two cold rolling operations, characterized in that a thermal treatment is carried out, prior to any one of cold rolling operations other than final cold rolling, at temperature in the range of 500° C. to 750° C. for a period in the range of 10 minutes to 480 hours. The grain oriented electrical steel sheet of the present invention exhibits through utilization of austenite-ferrite transformation superior magnetic properties after secondary recrystallization.

Abstract translation: 本发明提供一种制造晶粒取向电工钢板的方法，包括制备具有预定组成的钢板并进行至少两次冷轧操作的材料，其特征在于，在任何 在最终冷轧之外的冷轧操作之一，在500℃至750℃的温度范围内，持续10分钟至480小时的时间。 本发明的晶粒取向电工钢板通过二次再结晶后的奥氏体 - 铁素体相变优异的磁特性表现出来。

公开(公告)号：US20150255211A1

公开(公告)日：2015-09-10

申请号：US14430463

申请日：2012-12-11

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Kanyi Shen ,  Guobao Li ,  Shuangjie Chu ,  Yezhong Sun ,  Huabing Zhang ,  Yongjie Yang ,  Zhuochao Hu ,  Bin Zhao ,  Qi Hu ,  Jie Huang ,  Peili Zhang

IPC: H01F41/02 ,  C21D6/00 ,  C21D3/04 ,  C22C38/02 ,  C23C8/26 ,  C22C38/06 ,  C22C38/00 ,  H01F1/147 ,  H01F1/18 ,  H01F41/32 ,  C21D8/12 ,  C22C38/04

CPC classification number: H01F41/02 ,  C21D3/04 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1205 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C8/26 ,  H01F1/14783 ,  H01F1/14791 ,  H01F1/18 ,  H01F41/32

Abstract: A manufacturing method of oriented silicon steel with magnetic induction B8 of not less than 1.88 T, comprising the following steps: 1) smelting and continuous casting to obtain a slab, wherein the content of N is controlled at 0.002-0.014 wt % in the smelting stage; 2) hot-rolling; 3) cold-rolling; 4) decarbonizing and annealing; 5) nitriding treatment, wherein infiltrated nitrogen content [N]D is controlled to satisfy the formula: 328−0.14a−0.85b−2.33c≦[N]D≦362−0.16a−0.94b−2.57c, wherein a is the content of Als in the smelting step, with the unit of ppm; b is the content of N element, with the unit of ppm; and c is primary grains size, with the unit of μm; 6) coating a steel's surfaces with a magnesium oxide layer and annealing; and 7) applying an insulating coating.

Abstract translation: 具有不低于1.88T的磁感应B8的取向硅钢的制造方法，包括以下步骤：1）熔炼和连铸以获得板坯，其中N的含量在熔炼中控制在0.002-0.014重量％ 阶段; 2）热轧; 3）冷轧; 4）脱碳退火; 5）氮化处理，其中渗透氮含量[N] D被控制以满足下式：328-0.14a-0.85b-2.33c＆nlE; [N] D＆nlE; 362-0.16a-0.94b-2.57c，其中a是 冶炼步骤中Al的含量，单位为ppm; b是N元素的含量，单位为ppm; c为初级晶粒尺寸，单位为μm; 6）用氧化镁层涂覆钢表面并退火; 和7）施加绝缘涂层。

公开(公告)号：US20150197836A1

公开(公告)日：2015-07-16

申请号：US14669620

申请日：2015-03-26

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Tooru INAGUMA ,  Miho TOMITA ,  Hiroaki SAKAMOTO ,  Youji MIZUHARA

IPC: C22C38/18 ,  C22C38/06 ,  C22C38/02 ,  C22C38/04 ,  B32B15/01 ,  C22C38/00

CPC classification number: C22C38/18 ,  B32B15/01 ,  B32B15/011 ,  C21D3/04 ,  C21D8/0257 ,  C21D8/12 ,  C21D8/1222 ,  C21D2201/05 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/16 ,  H02K1/02 ,  Y10T428/12 ,  Y10T428/12431 ,  Y10T428/12799

Abstract: A cast slab containing C: less than 0.02 mass % and made of an Fe-based metal of an α-γ transforming component is subjected to hot rolling at a temperature of an A3 point or higher and is subjected to α-region rolling at a temperature of 300° C. or higher and lower than the A3 point, and thereby a base metal sheet having a {100} texture in a surface layer portion is fabricated. Then, by performing a heat treatment under predetermined conditions, an Fe-based metal sheet is obtained in which a Z value is not less than 2.0 nor more than 200 when intensity ratios of respective {001} , {116} , and {223} directions in a sheet plane by X-ray diffraction are set to A, B, and C respectively and Z=(A+0.97B)/0.98C is satisfied.

公开(公告)号：US09051622B2

公开(公告)日：2015-06-09

申请号：US13256166

申请日：2010-03-09

Applicant: Satoshi Arai ,  Yasuhide Morimoto ,  Kiyokazu Ishizuka ,  Kazutoshi Takeda

Inventor： Satoshi Arai ,  Yasuhide Morimoto ,  Kiyokazu Ishizuka ,  Kazutoshi Takeda

IPC: B21B1/08 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  H01F1/16

CPC classification number: C21D6/008 ,  B21B1/08 ,  C21D6/005 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/02 ,  C23C2/28 ,  C25D5/50 ,  C25D7/0614 ,  H01F1/16 ,  Y10T428/12458

Abstract: A non-oriented magnetic steel sheet contains, by mass %, C: 0.005% or less; Si: 2% to 4%; Mn and V: totally 11% or less; and Al: 3% or less, with the balance being Fe and inevitable impurities, wherein a Mn concentration (mass %) and a V concentration (mass %) in a thickness direction satisfy the following formula. 0.1

Abstract translation: 无取向电磁钢板以质量％计含有C：0.005％以下; Si：2％〜4％; Mn和V：总共为11％以下; 和Al：3％以下，余量为Fe和不可避免的杂质，其中厚度方向的Mn浓度（质量％）和V浓度（质量％）满足下式。 0.1 <（XsMn，V-XcMn，V）/ tMn，V <100，其中XsMn，V：钢板表面的Mn浓度（质量％）和V浓度（质量％）之和，XcMn ，V：钢板中心处的Mn浓度（质量％）和V浓度（质量％）之和，tMn，V：来自钢板表面的深度（mm）， Mn浓度（质量％）和V浓度（质量％）之和等于XcMn，V的位置。

公开(公告)号：US20150155085A1

公开(公告)日：2015-06-04

申请号：US14418847

申请日：2013-07-30

Applicant: ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO, S.L.

Inventor： Ban Gabor ,  Tom Van De Putte

IPC: H01F1/147 ,  C21D9/46 ,  C22C38/16 ,  C22C38/14 ,  H01F27/245 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C22C38/12

CPC classification number: H01F1/14783 ,  C21D8/12 ,  C21D8/1205 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C21D2201/05 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F27/245

Abstract: The present invention is directed at a method of production gain oriented Fe—Si steel sheet presenting an induction value at 800 A/m above 1.870 Tesla and a core power loss lower than 1.3 W/kg at a specific magnetic induction of 1.7 Tesla (T). The steel chemical composition comprises, in weight percentage: 2.8≦Si≦4, 0.20≦Cu≦0.6, 0.05≦Mn≦0.4, 0.001≦Al≦0.04, 0.025≦C≦0.05, 0.005≦N≦0.02, 0.005≦Sn≦0.03, S≦0.015 and optionally Ti, Nb, V or B in a cumulated amount below 0.02, the following relationships being respected: Mn/Sn≦40, 2.0≦C/N≦5.0, Al/N≦1.20, and the balance being Fe and other inevitable impurities.

Abstract translation: 本发明涉及一种生产增益取向的Fe-Si钢板的方法，其特征在于，在特斯拉（特斯拉）的特定磁感应下，以高于1.870特斯拉的800A / m的感应值和低于1.3W / kg的磁芯功率损耗 ）。 钢化学成分以重量百分数：2.8＆nlE; Si＆nlE; 4,0.20＆nlE; Cu＆nlE; 0.6,0.05＆nlE; Mn＆nlE; 0.4,0.001和nlE; Al＆NlE; 0.04,0.025＆nlE; C＆NlE; 0.05,0.005＆ 0.02，0.005＆nlE; Sn＆nlE; 0.03，S＆nlE; 0.015，任选的Ti，Nb，V或B的累积量低于0.02，满足以下关系：Mn / Sn＆nlE; 40,2.0＆nlE; C / N＆ /N≦̸1.20，余量为Fe等不可避免的杂质。

公开(公告)号：US20150111004A1

公开(公告)日：2015-04-23

申请号：US14395900

申请日：2012-04-26

Applicant: Kunihiro Senda ,  Hirotaka Inoue ,  Seiji Okabe

Inventor： Kunihiro Senda ,  Hirotaka Inoue ,  Seiji Okabe

IPC: H01F1/147 ,  C21D1/26 ,  C22C38/00 ,  C22C38/04 ,  C22C38/02 ,  C21D8/12 ,  C22C38/06

CPC classification number: H01F1/14775 ,  B21B3/02 ,  C21D1/26 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1244 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/34 ,  C22C38/42 ,  C22C38/60 ,  C25F1/06 ,  C25F3/06 ,  C25F3/14 ,  H01F1/16 ,  Y10T428/24545

Abstract: A grain-oriented electrical steel sheet has low iron loss properties obtained though magnetic domain refining treatment by a chemical means. The steel sheet has a linear groove extending in a direction forming an angle of 45° or less with a direction orthogonal to a rolling direction of the steel sheet, in which presence frequency of fine grains with a length in the rolling direction of 1 mm or less in a floor portion of the groove is 10% or less, including 0% indicative of the absence of fine grains, the groove is provided with a forsterite film in an amount of 0.6 g/m2 or more in terms of Mg coating amount per one surface of the steel sheet, and an average of angles (3 angles) formed by axes of secondary recrystallized grains facing the rolling direction and a rolling plane of the steel sheet is 3° or less.

Abstract translation: 晶粒取向电工钢板通过化学方式的磁畴精炼处理而获得的铁损性能低。 钢板具有沿与钢板的轧制方向正交的方向形成45°以下的角度的直线状槽，其中轧制方向上的长度为1mm的细晶粒的存在频率或 在槽的底板部分中较少的是10％或更小，包括0％表示不存在细晶粒，该槽的Mg涂层量为0.6g / m 2以上，镁设置有镁橄榄石膜 钢板的一个表面和与轧制方向相对的二次再结晶晶粒的<100'轴和钢板的轧制面的平均角度（3角）为3°以下。