公开(公告)号：US20220396848A1

公开(公告)日：2022-12-15

申请号：US17773801

申请日：2020-09-29

Applicant: LG Electronics Inc.

Inventor： Jin Bae KIM ,  Dongwon KANG ,  Joungwook KIM

IPC: C21D9/46 ,  C22C38/06 ,  C22C38/04 ,  C22C38/34 ,  C22C38/00 ,  C22C38/42 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  H01F1/147

Abstract: Disclosed are a non-oriented electrical steel sheet and a manufacturing method therefore, the sheet ensuring excellent magnetic characteristics by having increased texture intensity of surface (100) through strict control of the content ratio of Si, Al and the like and through final annealing heat treatment in an inert gas atmosphere.

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：US20200168376A1

公开(公告)日：2020-05-28

申请号：US16693603

申请日：2019-11-25

Applicant: LG ELECTRONICS INC.

Inventor： Dongwon KANG ,  Jin Bae KIM ,  Joungwook KIM

IPC: H01F1/147 ,  H01F1/22 ,  H01F41/02

Abstract: Disclosed are magnetic powders, compressed magnetic powders and a preparation method thereof. The magnetic powder contains a plate-shaped particle whose aspect ratio defined in a following relationship 1 is equal to or larger than 4: [relationship 1] aspect ratio=length of long side of plate-shaped particle/length of short side of plate-shaped particle.

公开(公告)号：US20240102122A1

公开(公告)日：2024-03-28

申请号：US18267689

申请日：2021-11-09

Applicant: LG ELECTRONICS INC.

Inventor： Yunsung KIM ,  Jin Bae KIM

IPC: C21D9/46 ,  C21D1/74 ,  C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/34 ,  C22C38/42 ,  H01F1/147

CPC classification number: C21D9/46 ,  C21D1/74 ,  C21D6/001 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/34 ,  C22C38/42 ,  H01F1/14783 ,  C22C2202/02

Abstract: Disclosed are a non-oriented electrical steel sheet and a method for manufacturing same, wherein the texture of the electrical steel sheet is optimized after cold rolling by controlling the temperature and atmosphere of decarburization annealing and final annealing, and thus excellent iron loss can be obtained even at low temperatures. In addition, disclosed are a non-oriented electrical steel sheet and a method for manufacturing same, wherein processes, from the processing of the electrical steel sheet into motor component to a final heat-treatment, are improved to enhance the strength of the texture aligned in the direction of easy magnetization and thereby improve the magnetic characteristics of the steel sheet.