Grain-oriented electromagnetic steel sheet, insulating coating formation method for grain-oriented electromagnetic steel sheet, and production method for grain-oriented electromagnetic steel sheet

A technology of electromagnetic steel plate and insulating cover, applied in the direction of manufacturing tools, plating of superimposed layers, circuits, etc., can solve the problems of tension and unavoidable magnetic properties of the base metal steel plate, and achieve the effect of easy movement and excellent magnetic properties.

Active Publication Date: 2021-08-20
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] As mentioned above, the present situation is that if the glass cover film is omitted from the grain-oriented electrical steel sheet, it is expected that the movement of the magnetic domain walls will be facilitated and the magnetic properties will be improved. On the other hand, it is difficult to apply tension to the base steel sheet, and the magnetic Characteristics (especially iron loss characteristics) decline

Method used

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  • Grain-oriented electromagnetic steel sheet, insulating coating formation method for grain-oriented electromagnetic steel sheet, and production method for grain-oriented electromagnetic steel sheet
  • Grain-oriented electromagnetic steel sheet, insulating coating formation method for grain-oriented electromagnetic steel sheet, and production method for grain-oriented electromagnetic steel sheet
  • Grain-oriented electromagnetic steel sheet, insulating coating formation method for grain-oriented electromagnetic steel sheet, and production method for grain-oriented electromagnetic steel sheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0250] Next, the effect of a solution of the present invention will be described in more detail through an example, but the conditions in the example are an example of conditions adopted to confirm the practicability and effect of the present invention, and the present invention is not limited to this An example of a condition. 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.

experiment example 1

[0252] Steel slab A containing C: 0.082% by mass, Si: 3.3% by mass, Mn: 0.082% by mass, S: 0.023% by mass, acid-soluble Al: 0.025% by mass, N: 0.008% by mass, and the remainder including Fe and impurities (steel billet A) and containing C: 0.081 mass%, Si: 3.3 mass%, Mn: 0.083 mass%, S: 0.022 mass%, acid-soluble Al: 0.025 mass%, N: 0.008 mass%, Bi: 0.0025 mass%, Steel slabs B (steel slabs B) containing Fe and impurities in the remainder were heated to 1350° C. and hot-rolled to obtain hot-rolled steel sheets with an average thickness of 2.3 mm.

[0253] After annealing at 1100° C. for 120 seconds for each of the obtained hot-rolled steel sheets, pickling was performed. The pickled steel sheet was finished to an average thickness of 0.23 mm by cold rolling to obtain a cold-rolled steel sheet.

[0254] Then, decarburization annealing is performed on the obtained cold-rolled steel sheet. In this decarburization annealing, the average temperature increase rate S1 during the temp...

experiment example 2

[0292] Steel slabs (steel slabs) having the chemical compositions shown in Table 3 below were heated to 1380° C. and hot-rolled to obtain hot-rolled steel sheets with an average thickness of 2.3 mm. Part of the steel cannot enter the next process due to cracks.

[0293]

[0294] The hot-rolled steel sheet ready for the next process is subjected to pickling after annealing at 1120°C for 120 seconds. The pickled steel sheet was finished by cold rolling to an average thickness of 0.23 mm to obtain a cold rolled steel sheet. Part of the steel failed to enter the next process due to cracks during cold rolling.

[0295] Decarburization annealing is performed on the steel plate that can enter the next process. In this decarburization annealing, the average temperature increase rate S1 in the temperature increase process from 500°C to 600°C is set to 900°C / sec, and the average temperature increase rate S2 in the temperature increase process from 600°C to 700°C is set to 900°C / sec...

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Abstract

The invention relates to a grain-oriented electromagnetic steel sheet. This grain-oriented electromagnetic steel sheet has a base steel sheet, an oxide layer, and a tension-imparting insulating coating. When the oxide layer is analyzed by Fourier transform infrared spectroscopy, the absorption A650 at 650 cm<-1> and the absorption A1250 at 1,250 cm-1 satisfy 0.2<=A650 / A1250<=5.0. In addition, the magnetic flux density B8 of the grain-oriented electromagnetic steel sheet in the rolling direction is at least 1.90 T.

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet, a method for forming an insulating coating on a grain-oriented electrical steel sheet, and a method for manufacturing a grain-oriented electrical steel sheet. [0002] This application claims priority based on Japanese Patent Application No. 2019-005237 filed on January 16, 2019, the contents of which are incorporated herein. Background technique [0003] A grain-oriented electrical steel sheet is a steel sheet containing about 0.5 to 7% by mass of silicon (Si), and the crystal orientation is concentrated in the {110}<001> orientation (Goss orientation) by applying a phenomenon called secondary recrystallization. In addition, {110}<001> means that the {110} plane of the crystal is arranged parallel to the rolling surface, and the <001> axis of the crystal is arranged parallel to the rolling direction. [0004] Grain-oriented electrical steel sheets are mainly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C23C22/00C23C22/07C21D9/46C23C28/04C22C38/00C22C38/60H01F1/147
CPCC21D9/46C22C38/60C23C28/04C21D8/1233C21D2201/05C21D6/008C21D8/1288C21D8/1283C21D8/1272C21D8/1255C22C38/02C22C38/04C22C38/002C22C38/008C22C38/16C22C38/06C22C38/001C23C22/74C23C22/08C23G1/08C23G1/086C23G1/081H01F1/14783H01F1/18C21D3/04C21D1/26C22C38/004C22C38/34C22C38/20C21D8/1222C23C22/00H01F1/147G01N21/67C21D8/0205C21D8/0226C21D8/0236C22C2202/02
Inventor 田中一郎片冈隆史竹田和年末永智也国田雄树
Owner NIPPON STEEL CORP
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