公开(公告)号：US10174392B2

公开(公告)日：2019-01-08

申请号：US14130568

申请日：2012-07-02

申请人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

发明人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D8/12

摘要： A method for producing a high-tensile cold-rolled steel sheet includes subjecting a slab having a composition containing C: more than 0.020% and less than 0.30%, Si: more than 0.10% and 3.00% or less, and Mn: more than 1.00% and 3.50% or less to hot rolling wherein the roll draft of the final one pass is higher than 15%, and rolling is finished in the temperature region of Ar3 point or higher, optionally annealing wherein the hot-rolled steel sheet is heated to 300° C. or higher after being cooled to 780° C. or lower, coiling higher than 400° C. or lower than 400° C., cold rolling the hot-rolled steel sheet or the annealed steel sheet, and annealing wherein the cold-rolled steel sheet is soaked in the temperature region of (Ac3 point−40° C.) or higher, cooling to 500° C. or lower and 300° C. or higher, and holding in that temperature region for 30 seconds or longer.

公开(公告)号：US20180358868A1

公开(公告)日：2018-12-13

申请号：US15622002

申请日：2017-06-13

申请人： FUKUTA ELECTRIC & MACHINERY CO., LTD.

发明人： Chin Feng Chang

IPC分类号： H02K11/01 ,  H02K15/03 ,  H02K1/27 ,  C21D8/12 ,  C22C38/02

摘要： A manufacturing method for a motor core includes a preparing step, a coating step, a stacking step, and a forming step. In the preparing step, the silicon steel sheets are cleaned and dried. In the coating step, an electrically insulating colloid is coated between each pair of adjacent silicon steel sheets. In the stacking step, the silicon steel sheets on which the electrically insulating colloid is applied are stacked on each other to form a layered structure. In the forming step, the stacked silicon steel sheets are subjected to a colloid curing process so that the electrically insulating colloid forms a thermosetting plastic. This reduces the chance of forming eddy currents, reducing the eddy current loss of the motor core during operation.

公开(公告)号：US10131018B2

公开(公告)日：2018-11-20

申请号：US14390110

申请日：2013-04-24

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Koji Hirano ,  Satoshi Arai ,  Hideyuki Hamamura ,  Hirofumi Imai

IPC分类号： B23K26/082 ,  B23K26/364 ,  C21D8/12 ,  C22C38/00 ,  C22C38/06 ,  H01F1/16 ,  C22C38/02 ,  C22C38/04 ,  C21D10/00

摘要： A grain-oriented magnetic steel sheet includes grooves each of which extends in a direction intersecting a transportation direction, the grooves being formed at predetermined pitches PL in the transportation direction by laser beam irradiation, in which a relationship between a standard deviation value D and the pitch PL satisfies the following expression (1), the standard deviation value D being a standard deviation of distances between a linear approximation line, which is obtained from a center line of each of the grooves in a groove width direction by a least-squares method, and respective positions on the center line, and an average angle formed between tangent lines of the respective positions on the center line and a direction perpendicular to the transportation direction is more than 0° to 30°. [Expression 1] 0.02≤(D/PL)  (1)

公开(公告)号：US10102951B2

公开(公告)日：2018-10-16

申请号：US14774258

申请日：2014-03-11

申请人： JFE STEEL CORPORATION

发明人： Yoshihiko Oda ,  Hiroaki Toda ,  Shinji Koseki ,  Tatsuhiko Hiratani ,  Tadashi Nakanishi ,  Tomoyuki Okubo

IPC分类号： H01F1/147 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  H01F1/16 ,  C22C38/02 ,  C22C38/04 ,  C21D8/12

摘要： A non-oriented electrical steel sheet having a high magnetic flux density and a low anisotropy contains C: not more than 0.01 mass %, Si: 1-4 mass %, Mn: 0.05-3 mass %, P: 0.03-0.2 mass %, S: not more than 0.01 mass %, Al: not more than 0.004 mass %, N: not more than 0.005 mass %, As: not more than 0.003 mass %, and preferably further contains one or two of Sb: 0.001-0.1 mass % and Sn: 0.001-0.1 mass % or further contains one or two of Ca: 0.001-0.005 mass % and Mg: 0.001-0.005 mass %.

公开(公告)号：US10096414B2

公开(公告)日：2018-10-09

申请号：US14368651

申请日：2012-12-28

申请人： POSCO

发明人： Junesoo Park ,  Byung-Keun Bae ,  Yong-Soo Kim ,  Su-Yong Sin

IPC分类号： H01F1/16 ,  H01F1/147 ,  C22C38/00 ,  C22C38/60 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C21D8/12

摘要： Disclosed are a non-oriented electrical steel sheet and a method of manufacturing the same. The non-oriented electrical steel sheet of the present invention includes 0.005 wt % or less of C, 1.0-4.0 wt % of Si, 0.1-0.8 wt % of Al, 0.01-0.1 wt % of Mn, 0.02-0.3 wt % of P, 0.005 wt % or less of N, 0.001-0.005 wt % of S, 0.005 wt % or less of Ti, 0.01-0.2 wt % of at least one of Sn and Sb, and the remainder including Fe and other impurities unavoidably added thereto, wherein Mn, Al, P, and S may respectively fulfill the empirical formula 0.8≤{[Mn]/(100*[S])+[Al]}[P]≤40, wherein [Mn], [Al], [P], and [S] respectively refer to weight percentages of Mn, Al, P, and S.

公开(公告)号：US20180265945A1

公开(公告)日：2018-09-20

申请号：US15762623

申请日：2016-09-01

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Yuanyuan YAN ,  Gaofei LIANG ,  Guoping CHENG ,  Changqing LIN

IPC分类号： C21D9/52 ,  C21D1/26 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12

摘要： A continuous annealing method for low coercive force cold-rolled electromagnetic pure iron plate and strip. Control parameters of each stages in a continuous annealing process are as follows: 750-850° C. at a heating stage; 750-850° C. at a soaking stage, the soaking time is 100-150 s; an outlet temperature of 575-675° C. at a slow-cooling stage, the cooling speed in slow-cooling stage is 2.5-10° C./s; an outlet temperature of 380-420° C. at a fast-cooling stage, the cooling speed of the fast-cooling stage is 15-25° C./s; and 270-310° C. at an overaging stage. The annealing medium is a non-oxidizing atmosphere composed of H2 and N2. After annealing, the cold-rolled electromagnetic pure iron plate and strip is leveled and pressed such that the leveling elongation rate of the plate and strip is controlled within the range of 0.2±0.1%. The process of the continuous annealing method is simple, and the produced cold-rolled electromagnetic pure iron plate and strip can achieve an overall performance of low coercive force and good formability without further magnetic annealing.

公开(公告)号：US10072943B2

公开(公告)日：2018-09-11

申请号：US14002231

申请日：2012-03-05

申请人： Peter Kogej ,  Vojteh Leskovsek

发明人： Peter Kogej ,  Vojteh Leskovsek

IPC分类号： G01D5/12 ,  C21D7/02 ,  C21D7/10 ,  C21D8/12 ,  C21D9/00 ,  C21D10/00 ,  C23C8/02 ,  H01F1/16 ,  B23P13/00 ,  C23C8/38

CPC分类号： G01D5/12 ,  B23P13/00 ,  C21D7/02 ,  C21D7/10 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1277 ,  C21D8/1294 ,  C21D9/00 ,  C21D9/0068 ,  C21D10/00 ,  C21D10/005 ,  C21D2201/00 ,  C21D2211/001 ,  C21D2211/008 ,  C23C8/02 ,  C23C8/38 ,  H01F1/16 ,  Y10T29/49

摘要： The present invention relates to a method for producing a magnetic substrate for an encoder scale. The method comprising the step of mechanically working the substrate, wherein the substrate is cooled prior to the mechanical working step. In one embodiment, a stainless steel substrate is used. The stainless steel may comprise an austenite (non-magnetic) phase and a martensite (magnetic) phase. Mechanically working and cooling in this manner increases the amount of magnetic (martensite) phase material that is formed, thereby improving the magnetic contrast when non-magnetic (austenite) marking are subsequently formed on the substrate by laser marking.

公开(公告)号：US20180251869A1

公开(公告)日：2018-09-06

申请号：US15562994

申请日：2016-04-05

申请人： JFE STEEL CORPORATION

发明人： Naoki MURAMATSU ,  Nobuko NAKAGAWA ,  Kazumichi SASHI ,  Chiyoko TADA

IPC分类号： C21D8/12 ,  C23C22/68 ,  C09D5/08 ,  B05D3/02

摘要： The disclosure provides an electrical steel sheet with an insulating coating excellent in both punchability and powdering resistance, without any chromium compound being contained in the insulating coating. The electrical steel sheet with an insulating coating includes an electrical steel sheet and an insulating coating formed on the electrical steel sheet. The insulating coating contains Si and particulate organic resin. The organic resin contains primary particles having an average primary particle size of 1.0 μm or less, and 5% or more and 50% or less of the primary particles of the organic resin are agglomerated particles.

公开(公告)号：US10031068B2

公开(公告)日：2018-07-24

申请号：US14425983

申请日：2013-09-25

申请人： JFE STEEL CORPORATION

发明人： Tomohiko Ito ,  Junichi Yotsuji ,  Shigehiro Takajo ,  Hiroi Yamaguchi ,  Kazuhiro Hanazawa ,  Yasunari Koga

IPC分类号： H01F1/16 ,  C21D8/12 ,  G01N21/21 ,  G01R33/032 ,  G01N21/86 ,  C22C38/00 ,  H01F41/02 ,  C21D11/00 ,  C21D1/38 ,  G01N27/82 ,  C21D1/34 ,  C21D9/46

摘要： A steel sheet inspection device includes: a magnetooptic element that is able to detect, as an optical property, a magnetic domain structure of a steel sheet to be inspected; a light source that irradiates the magnetooptic element with linearly polarized light; a detector that detects the linearly polarized light with a polarization plane rotated according to the magnetic domain structure of the steel sheet transferred to the magnetooptic element; and a drive mechanism that drives at least the magnetooptic element so as to contact and separate the steel sheet and the magnetooptic element with and from each other.

公开(公告)号：US20180202018A1

公开(公告)日：2018-07-19

申请号：US15742144

申请日：2016-07-06

申请人： JFE STEEL CORPORATION

发明人： Takeshi Imamura ,  Masanori Takenaka

IPC分类号： C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C21D3/04 ,  C22C38/14 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147

CPC分类号： C21D9/46 ,  C21D1/74 ,  C21D3/04 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/00 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

摘要： In the production of a grain-oriented electrical steel sheet by hot rolling a slab containing Si: 2.0-8.0 mass % and no inhibitor-forming ingredients, cold rolling, subjecting to a decarburization annealing, applying an annealing separator composed mainly of MgO and containing a Ti compound(s) and subjecting to a finish annealing, an atmosphere in the heating process of the decarburization annealing is rendered into a dry atmosphere having a dew point of not higher than 0° C. and a Ti amount (Ti(a)) and a N amount (N(a)) contained in an iron matrix after the removal of a forsterite coating and a Ti amount (Ti(b)) and a N amount (N(b)) contained in the steel sheet having a forsterite coating are made to satisfy relationships as N(b)≤0.0050 mass %, N(b)/N(a)≥4, and Ti(b)/Ti(a)≥4.