公开(公告)号：US11355275B2

公开(公告)日：2022-06-07

申请号：US16492800

申请日：2018-01-24

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Zipeng Zhao ,  Guobao Li ,  Yongjie Yang ,  Meihong Wu ,  Changsong Ma ,  Yaming Ji ,  Chen Ling ,  Weiyong Xie ,  Jianguo Guo

IPC: H01F27/245 ,  B23K26/364 ,  C21D8/12 ,  C25F3/06

Abstract: A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 μm, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 μm, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.

公开(公告)号：US11633809B2

公开(公告)日：2023-04-25

申请号：US17041323

申请日：2018-06-20

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Shuangjie Chu ,  Zipeng Zhao ,  Yongjie Yang ,  Changsong Ma ,  Meihong Wu ,  Yaming Ji ,  Aihua Ma ,  Weiyong Xie ,  Hai Liu ,  Jianguo Guo

IPC: B23K26/364 ,  H01F1/147 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  B23K26/067 ,  B23K26/06 ,  B23K26/0622 ,  B23K103/04 ,  B23K101/38 ,  H01F27/245

Abstract: A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. The manufacturing method for a heat-resistant magnetic domain refined grain-oriented silicon steel comprises the step of: forming grooves on a single-sided surface or a double-sided surface of a heat-resistant magnetic domain refined grain-oriented silicon steel in a laser grooving manner, a laser beam of the laser grooving is divided into several sub-beams by a beam splitter, and the several sub-beams form the several sub-grooves which are spliced into the same groove.

公开(公告)号：US20250066922A1

公开(公告)日：2025-02-27

申请号：US18724975

申请日：2023-01-13

Applicant: Baoshan Iron & Steel Co., Ltd.

Inventor： Yaming Ji ,  Chen Ling ,  Guobao Li ,  Yongjie Yang ,  Meihong Wu ,  Zipeng Zhao ,  Changsong Ma

IPC: C23C22/20 ,  C22C38/02 ,  C23C22/74 ,  C23C22/82

Abstract: The present disclosure relates to a coating, comprising a phosphate salt, a colloidal silica and a chromic acid compound, wherein the phosphate salt comprises magnesium dihydrogen phosphate and aluminum dihydrogen phosphate, and wherein a molar ratio of element Al to element Mg in the phosphate salt is 0.02 to 0.15. The present disclosure also relates to a grain-oriented silicon steel sheet, comprising: a substrate; and a coating layer on a surface of the substrate, wherein the coating layer is formed from the coating according to the present disclosure. The present disclosure further relates to a method for manufacturing a grain-oriented silicon steel sheet, comprising the steps of: applying the coating onto the surface of the substrate, and then performing a sintering treatment, wherein the substrate has a temperature, at which the sintering treatment is performed, of 800 to 880° C. The coating layer formed from the coating according to the present disclosure can impart higher tension and more excellent heat resistance to the grain-oriented silicon steel sheet, and has good promotion prospects and application effects.

公开(公告)号：US11459634B2

公开(公告)日：2022-10-04

申请号：US16963334

申请日：2018-06-21

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Shuangjie Chu ,  Guobao Li ,  Yongjie Yang ,  Zipeng Zhao ,  Changsong Ma ,  Kanyi Shen ,  Meihong Wu ,  Yaming Ji ,  Huabing Zhang ,  Zhuochao Hu

IPC: C21D9/46 ,  C21D1/30 ,  C21D8/12 ,  B23K26/0622 ,  B23K26/082 ,  B23K26/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F41/02

Abstract: Disclosed is a method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel, the method comprising: carrying out, by means of a pulse laser, scanning grooving on a single surface or two surfaces of a silicon steel sheet after cold rolling, or after decarburizing annealing, or after high temperature annealing or after hot stretching, temper rolling and annealing, and forming several grooves parallel with each other in a rolling direction of the silicon steel sheet, wherein a single pulse time width of the pulse laser is 100 ns or less, and a single pulse peak energy density is 0.05 J/cm2 or more; the energy density of a single scan of a single laser beam is 1 J/cm2 to 100 J/cm2; a beam spot of the pulse laser is a single beam spot or a combination of a plurality of beams spots, the shape of the beam spot is circular or elliptic, and the diameter of the beam spot in a scanning direction is 5 μm to 1 mm, and the diameter thereof in a direction perpendicular to the scanning direction is 5 μm to 300 μm; and when scanning grooving is carried out at the same position on the silicon steel sheet, the product of the number of beam spots of the pulse laser and the scan times is 5 or more.