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Grain-oriented electrical steel sheet and method for manufacturing same

A technology of electromagnetic steel sheet and manufacturing method, which is applied in the direction of manufacturing tools, circuits, magnetic objects, etc., and can solve problems such as difficulty in securing land and rising manufacturing costs

Active Publication Date: 2021-09-10
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] By forming such an intermediate layer, the adhesion of the film can be improved, but since large-scale equipment such as new electrolytic treatment equipment and dry coating are required, it may be difficult to secure land and the manufacturing cost may increase.

Method used

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  • Grain-oriented electrical steel sheet and method for manufacturing same
  • Grain-oriented electrical steel sheet and method for manufacturing same
  • Grain-oriented electrical steel sheet and method for manufacturing same

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Embodiment

[0236] Next, the effect of one form of the present invention will be described in more detail using an example, but the conditions in the example are an example of conditions adopted to confirm the possibility and effect of the present invention, and the present invention is not limited to this one Condition example.

[0237] In the present invention, various conditions can be adopted as long as the object of the present invention is achieved without departing from the gist of the present invention.

[0238] The raw material slabs with the composition shown in Table 1 were subjected to hot rolling after being soaked at 1150° C. for 60 minutes to produce hot-rolled steel sheets with a thickness of 2.3 mm. Next, this hot rolling was held at 1120° C. for 200 seconds, immediately cooled, and held at 900° C. for 120 seconds, followed by quenched hot-rolled sheet annealing. After the hot-rolled annealed sheet was annealed, the hot-rolled annealed sheet was subjected to cold rolling...

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Abstract

The invention relates to a grain-oriented electrical steel sheet, and the sheet comprises a base material steel sheet (1), an intermediate layer (4) provide upon the base material steel sheet (1) so as to be in contact therewith, and an insulating coating film (3) provided upon the intermediate layer (4) so as to be in contact therewith, said grain-oriented electrical steel sheet being characterized in that the surface of the base material steel sheet (1) has a strained domain (D) extending in a direction intersecting the rolling direction of the base material steel sheet (1), and in cross section in the plane parallel to the rolling direction of the base material steel sheet (1) and to the sheet thickness direction, a crystalline phosphate M2P4O13 is present in the insulating coating film (3) above the strained domain (D) (M signifies one or both of Fe and Cr).

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet excellent in film adhesion. In particular, the present invention relates to a grain-oriented electrical steel sheet excellent in film adhesion of an insulating film even without a forsterite film. [0002] This application claims priority based on Japanese Patent Application No. 2019-005057 filed in Japan on January 16, 2019, the contents of which are incorporated herein by reference. Background technique [0003] Grain-oriented electrical steel sheet is a soft magnetic material, which is mainly used as the iron core material of the transformer. Therefore, magnetic properties with high magnetization properties and low iron loss are required. The magnetization characteristic refers to the magnetic flux density excited when the iron core is excited. The higher the magnetic flux density, the more compact the iron core can be, which is advantageous in terms of the device configurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C22C38/00C22C38/60H01F1/147C23C22/00
CPCC21D6/008C21D1/76C21D8/1255C21D8/1283C21D8/1272C21D2201/05C21D10/00C21D9/46C23C22/08C23C22/74H01F1/18C21D3/04C21D6/005C21D8/1294C22C38/02C22C38/04C22C38/00C22C38/06C22C38/001C21D8/1222C23C22/00H01F1/147B23K26/355C21D8/12C21D8/005C21D8/1233C21D2221/00
Inventor 牛神义行山本信次滨村秀行片冈隆史奥村俊介
Owner NIPPON STEEL CORP
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