公开(公告)号：US20240102123A1

公开(公告)日：2024-03-28

申请号：US18276733

申请日：2022-01-28

Applicant: LG ELECTRONICS INC.

Inventor： Changwoo JEONG ,  Jin Bae KIM

IPC: C21D9/46 ,  C21D1/74 ,  C21D8/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/40 ,  H01F1/147 ,  H01F41/00

CPC classification number: C21D9/46 ,  C21D1/74 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/40 ,  H01F1/14783 ,  H01F41/00

Abstract: The present invention relates to a method for manufacturing a non-oriented electrical steel sheet, and a non-oriented electrical steel sheet manufactured thereby, and the method for manufacturing a non-oriented electrical steel sheet, according to the present invention, comprises the steps of: (a) reheating a steel slab comprising 0.05 wt % or less of C, 1.0-3.5 wt % of Si, 0.2-0.6 wt % of Al, 0.02-0.20 wt % of Mn, 0.01-0.20 wt % of P, 0.01 wt % or less of S, and the balance of Fe and inevitable impurities, and then performing hot rolling on same; (b) performing hot rolling annealing heat-treatment and pickling on a hot rolled steel sheet; (c) performing cold rolling on the pickled steel sheet; (d) performing insulation coating on the cold rolled steel sheet, and then processing same; and (e) performing final heat treatment by heating, soaking and cooling the processed steel sheet, wherein soaking process is maintained and carried out at a temperature of 850° C. or higher for 1-30 minutes, and thus the deterioration of an insulation coating layer is inhibited while magnetic properties are improved.

公开(公告)号：US20240047107A1

公开(公告)日：2024-02-08

申请号：US18276857

申请日：2022-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Minako FUKUCHI ,  Yoshiaki NATORI ,  Hiroyasu FUJII ,  Shinsuke TAKATANI

IPC: H01F1/147 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46 ,  C21D6/00 ,  C23C22/03

CPC classification number: H01F1/14783 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C23C22/03 ,  C22C2202/02

Abstract: This non-oriented electrical steel sheet includes a base steel sheet (10); and an insulation coating (20) formed on a surface of the base steel sheet (10), in which the insulation coating (20) contains a metal phosphate and an organic resin, an arithmetic mean of a center line average roughness Ra75 of the insulation coating (20) in a rolling direction of the base steel sheet (10) and a center line average roughness Ra75 of the insulation coating (20) in a direction perpendicular to the rolling direction is 0.20 to 0.50 μm, and the amount of nitrogen in the insulation coating (20) is 0.05 to 5.00 mass %.

公开(公告)号：US20180066333A1

公开(公告)日：2018-03-08

申请号：US15551849

申请日：2016-01-07

Applicant: JFE STEEL CORPORATION

Inventor： Hiroaki Nakajima ,  Tomoyuki Okubo ,  Tadashi Nakanishi ,  Yoshihiko Oda

IPC: C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C22C38/60 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  H01F41/02 ,  H02K1/02 ,  H02K15/02

CPC classification number: C21D9/46 ,  C21D1/74 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  H01F1/14783 ,  H01F1/16 ,  H01F41/0233 ,  H02K1/02 ,  H02K15/02

Abstract: In the production of a non-oriented electrical stress sheet by hot rolling a slab having a chemical composition comprising, by mass %, C: not more than 0.005, Si: 1.5-6.0, Mn: 0.05-2.0 and P: 0.03-0.15, subjecting to a hot band annealing, if necessary, cold rolling, finish annealing, and forming an insulation coating, the cooling from 700° C. to 500° C. in the finish annealing is conducted in an oxidizing atmosphere with an oxygen potential PH2O/PH2of not less than 0.001 for 1-300 seconds, whereby P is segregated into the surface of the steel sheet after the finish annealing to obtain a non-oriented electrical steel sheet enhancing a crystal grain growth properties in the stress relief annealing.

公开(公告)号：US20160163448A1

公开(公告)日：2016-06-09

申请号：US15040534

申请日：2016-02-10

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Hitoshi MATSUURA ,  Kenji OTAKE

IPC: H01F41/02 ,  H01F1/24 ,  H01F1/147

CPC classification number: H01F41/0246 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/34 ,  C22C2202/02 ,  H01F1/14783 ,  H01F1/14791 ,  H01F1/24 ,  H01F1/33 ,  H01F5/00 ,  H01F27/24 ,  H01F27/255 ,  Y10T428/249956 ,  B22F9/082 ,  B22F3/02 ,  B22F3/10 ,  B22F1/02 ,  C22C33/0278

Abstract: A method for manufacturing a magnetic grain compact, includes: providing multiple metal grains constituted by soft magnetic alloy containing Fe, Si, and a metal element M that oxidizes more easily than Fe; compacting the metal grains; and forming oxide film formed on a surface of the metal grains, and forming first bonding parts where adjacent metal grains are directly contacted and bonded together, and second bonding parts where adjacent metal grains are bonded together via the oxide film formed around the entire surface of said adjacent metal grains other than the first bonding parts, by applying heat treatment to the compacted metal grains, thereby obtaining a magnetic grain compact.

Abstract translation: 一种制造磁性颗粒压块的方法包括：提供由含有Fe，Si和比Fe更容易氧化的金属元素M的软磁性合金构成的多个金属颗粒; 压实金属颗粒; 以及形成在所述金属颗粒的表面上的氧化膜，并且形成相邻金属颗粒直接接触并接合在一起的第一接合部分，以及相邻金属颗粒通过形成在所述金属颗粒的整个表面周围的氧化膜 通过对压实的金属颗粒进行热处理，除了第一粘合部分之外的所述相邻金属颗粒，从而获得磁性颗粒成形体。

公开(公告)号：US09187830B2

公开(公告)日：2015-11-17

申请号：US13577946

申请日：2011-02-15

Applicant: Shuichi Yamazaki ,  Takeshi Kubota ,  Yousuke Kurosaki ,  Masahiro Fujikura ,  Takahide Shimazu

Inventor： Shuichi Yamazaki ,  Takeshi Kubota ,  Yousuke Kurosaki ,  Masahiro Fujikura ,  Takahide Shimazu

IPC: H01F1/18 ,  C23C8/10 ,  C23C24/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C8/18 ,  C23C22/74 ,  C23C28/00

CPC classification number: H01F1/14783 ,  C21D1/26 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1244 ,  C21D8/1283 ,  C21D8/1288 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C23C8/10 ,  C23C8/18 ,  C23C22/07 ,  C23C22/50 ,  C23C22/74 ,  C23C24/00 ,  C23C28/00 ,  H01F1/18 ,  H01F41/32

Abstract: A non-oriented electrical steel sheet includes: a base iron (1); and a tension applying type insulating film (2) of not less than 1 g/m2 nor more than 6 g/m2 on a surface of the base iron (1). An oxide layer (3) containing at least one type of oxide selected from the group consisting of Si, Al, and Cr and having a thickness of not less than 0.01 μm nor more than 0.5 μm is formed on the surface of the base iron (1).

Abstract translation: 无取向电工钢板包括：基底铁（1）; 以及在基础铁（1）的表面上不小于1g / m 2且不大于6g / m 2的张力施加型绝缘膜（2）。 在基底铁的表面上形成含有选自Si，Al和Cr中的至少一种氧化物层（3），厚度不小于0.01μm，不大于0.5μm的氧化物层 1）。

公开(公告)号：US09030285B2

公开(公告)日：2015-05-12

申请号：US14113801

申请日：2011-10-13

Applicant: Hitoshi Matsuura ,  Kenji Otake

Inventor： Hitoshi Matsuura ,  Kenji Otake

IPC: H01F5/00 ,  H01F27/255 ,  H01F1/24 ,  H01F1/33 ,  H01F41/02 ,  C22C38/34 ,  H01F1/147

CPC classification number: H01F41/0246 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/34 ,  C22C2202/02 ,  H01F1/14783 ,  H01F1/14791 ,  H01F1/24 ,  H01F1/33 ,  H01F5/00 ,  H01F27/24 ,  H01F27/255 ,  Y10T428/249956 ,  B22F9/082 ,  B22F3/02 ,  B22F3/10 ,  B22F1/02 ,  C22C33/0278

Abstract: A magnetic material suitable for a coil component has multiple metal grains constituted by Fe—Si-M soft magnetic alloy (where M is a metal element that oxidizes more easily than Fe) and oxide film formed on the surface of the metal grains, wherein such magnetic material includes a grain compact having bonding parts where adjacent metal grains are bonded together via the oxide film formed on their surface, and bonding parts where metal grains are directly bonded together in areas where oxide film does not exist. The magnetic material is capable of improving both insulation resistance and magnetic permeability.

Abstract translation: 适用于线圈部件的磁性材料具有由Fe-Si-M软磁性合金（其中M是比Fe更容易氧化的金属元素）构成的多个金属颗粒和形成在金属颗粒表面上的氧化膜，其中 磁性材料包括具有通过其表面上形成的氧化物膜将相邻的金属颗粒结合在一起的结合部分的晶粒，以及在不存在氧化膜的区域中金属颗粒直接结合在一起的接合部。 磁性材料能够提高绝缘电阻和磁导率。

公开(公告)号：US20150047757A1

公开(公告)日：2015-02-19

申请号：US14389602

申请日：2013-03-27

Applicant: NISSHIN STEEL CO., LTD.

Inventor： Tomonaga Iwatsu ,  Yukio Katagiri ,  Susumu Fujiwara ,  Akito Kawamoto

IPC: H01F1/18 ,  C21D1/26 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/20 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  C21D8/12

CPC classification number: C21D9/46 ,  C21D1/26 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0252 ,  C21D8/1233 ,  C21D8/1238 ,  C21D8/1266 ,  C21D8/1288 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  H01F1/14716 ,  H01F1/14725 ,  H01F1/14775 ,  H01F1/14783 ,  H01F1/14791 ,  H01F1/18 ,  H02K1/2706 ,  Y10T428/31678

Abstract: The present invention provides a steel sheet for a rotor core for an IPM motor, wherein the steel sheet has a magnetic flux density B8000 of 1.65 T or more as measured when magnetic field strength is 8000 A/m, and a residual magnetic flux density Br of 0.5 T or more as measured at that time, and optionally, a coercivity Hc of 100 A/m or more as measured after magnetization reaches 8000 A/m. By using the steel sheet of the present, invention for a rotor core of an IPM motor, it is possible to increase further an output torque in a high-speed rotational range and raise further the maximum, rotational speed.

Abstract translation: 本发明提供一种用于IPM电动机的转子铁心用钢板，其特征在于，所述钢板的磁通密度B8000为1.65T以上，磁场强度为8000A / m时测定，剩余磁通密度Br 在此时测定为0.5T以上，任意地，磁化后测定的矫顽力Hc为100A / m以上，达到8000A / m。 通过使用本发明的用于IPM电动机的转子铁心的发明，可以进一步提高高速旋转范围的输出转矩，进一步提高最大转速。

公开(公告)号：US20140342150A1

公开(公告)日：2014-11-20

申请号：US14362167

申请日：2012-05-31

Applicant: Takeaki Wakisaka

Inventor： Takeaki Wakisaka

IPC: H01F1/147

CPC classification number: H01F1/14783 ,  B21B3/02 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/00 ,  C22C38/001 ,  C22C38/004 ,  C22C38/06 ,  C22C38/34 ,  H01F1/14791 ,  H01F1/16 ,  Y10T428/265

Abstract: A non-oriented electrical steel sheet includes: C: 0.005 mass % or less; S: 0.003 mass % or less; N: 0.003 mass % or less; Si: 2.0 mass % or more and less than 4.5 mass %; Al: 0.15 mass % or more and less than 2.5 mass %; and Cr: 0.3 mass % or more and less than 5.0 mass %; and a balance being composed of Fe and inevitable impurities; and a Cr-oxide-containing layer having a thickness of not less than 0.01 μm nor more than 0.5 μm on a surface side, in which when [Si], [Al], and [Cr] are set to the Si content, the Al content, and the Cr content (mass %) of the non-oriented electrical steel sheet respectively, and t is set to a sheet thickness (mm) of the non-oriented electrical steel sheet, 10 mass %≦2[Si]+2[Al]+[Cr]

Abstract translation: 无取向电工钢板包括：C：0.005质量％以下; S：0.003质量％以下; N：0.003质量％以下 Si：2.0质量％以上且小于4.5质量％ Al：0.15质量％以上且小于2.5质量％ Cr：0.3质量％以上且小于5.0质量％ 余量由Fe和不可避免的杂质组成; 以及当将[Si]，[Al]和[Cr]设定为Si含量时，在表面侧具有不小于0.01μm或不大于0.5μm的厚度的含Cr氧化物的层， Al含量和无取向电工钢板的Cr含量（质量％），t设定为无方向性电磁钢板的板厚（mm），10质量％＆lt; 1lE; 2 [Si] +2 [Al] + [Cr] <15质量％，（2 [Al] + [Cr]）/ 2 [Si] -10t2＆nlE; 0.35。

公开(公告)号：US20120274437A1

公开(公告)日：2012-11-01

申请号：US13313999

申请日：2011-12-07

Applicant: Hitoshi MATSUURA ,  Kenji OTAKE

Inventor： Hitoshi MATSUURA ,  Kenji OTAKE

IPC: H01F27/28 ,  H01F27/24

CPC classification number: H01F41/0246 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/34 ,  C22C2202/02 ,  H01F1/14783 ,  H01F1/14791 ,  H01F1/24 ,  H01F1/33 ,  H01F5/00 ,  H01F27/24 ,  H01F27/255 ,  Y10T428/249956 ,  B22F9/082 ,  B22F3/02 ,  B22F3/10 ,  B22F1/02 ,  C22C33/0278

Abstract: A magnetic material constituted by a grain-compacted body comprising a plurality of metal grains made of a Fe—Si—M soft magnetic alloy (where M is a metal element more easily oxidized than Fe) and an oxide film formed on the surface of the metal grains; wherein there are bonding portions via the oxide film formed on the surfaces of adjacent metal grains and direct bonding portions of metal grains in locations where the oxide film is not present.

Abstract translation: 由包含由Fe-Si-M软磁合金（其中M是比Fe更容易氧化的金属元素）的多个金属颗粒的颗粒压实体构成的磁性材料和形成在该表面上的氧化膜 金属颗粒 其中在相邻的金属颗粒的表面上形成有通过氧化物膜的接合部分和在不存在氧化膜的位置处的金属颗粒的直接接合部分。

公开(公告)号：US20050224142A1

公开(公告)日：2005-10-13

申请号：US11145705

申请日：2005-06-06

Applicant: Yasuyuki Hayakawa ,  Mitsumasa Kurosawa ,  Seiji Okabe ,  Takeshi Imamura

Inventor： Yasuyuki Hayakawa ,  Mitsumasa Kurosawa ,  Seiji Okabe ,  Takeshi Imamura

IPC: C21D8/12 ,  C22C38/00 ,  C22C38/06 ,  H01F1/147 ,  H01F1/16

CPC classification number: C21D8/1272 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1283 ,  C22C38/004 ,  C22C38/06 ,  H01F1/14783

Abstract: A grain oriented electromagnetic steel sheet is free from an undercoating mainly composed of forsterite (Mg2SiO4), excellent in processability and magnetic properties and useful to production cost, and has a composition containing, by % by mass, 2.0 to 8.0% of Si, wherein secondary recrystallized grains contains fine crystal grains having a grain diameter of 0.15 mm to 0.50 mm at a rate of 2 grains/cm2 or more. In the process of producing the steel sheet, inhibitors are not utilized, and the fine crystal grains are achieved by high purification and low temperature final annealing.

Abstract translation: 晶粒取向电磁钢板不含主要由镁橄榄石（Mg 2 SiO 4）组成的底涂层，其加工性能和磁性能优异并且对生产成本有用，并且具有 以质量％计含有2.0〜8.0％的Si的组合物，其中二次再结晶晶粒以2晶粒/ cm 2的速度包含粒径为0.15mm至0.50mm的细晶粒， 或者更多。 在制造钢板的过程中，不利用抑制剂，通过高纯化和低温最终退火实现细晶粒。